Words Starting With o

5,662 wordsClick any word to check it in the dictionary

O-starting words include short (OF, OR, ON, OX, OD, OE, OH, OK, OM, OP, OR, OS, OW) and longer power words (OBEY, OBJECT, OBLIGE, OBSCURE, OCCUPY, OCCUR, OFFER, OFFICE, OFTEN, OLDER). O- prefixes are productive.

2-Letter Words Starting With O(12)

od oe of oh om on op or os ow ox oy

3-Letter Words Starting With O(45)

oaf oak oar oat obe obi oca odd ode ods oes off oft ohm oho ohs oil oka oke old ole oms one ons ooh oot ope ops opt ora orb orc ore ors ort ose oud our out ova owe owl own oxo oxy

4-Letter Words Starting With O(107)

5-Letter Words Starting With O(181)

Showing 150 of 181 words

6-Letter Words Starting With O(325)

oafish oakums oaring oaters obeahs obelia obelus obeyed obeyer obiism object objets oblast oblate oblige oblong oboist oboles obolus obsess obtain obtect obtest obtund obtuse obvert occult occupy occurs oceans ocelli ocelot ochers ochery ochone ochrea ochred ochres ockers ocreae octads octane octans octant octave octavo octets octopi octroi octyls ocular oculus oddest oddish oddity odeons odeums odious odists odiums odored odours odyles oedema oeuvre offals offcut offend offers office offing offish offkey offset oftest ogdoad oghams ogival ogives oglers ogling ogress ogrish ogrism ohmage oidium oilcan oilcup oilers oilier oilily oiling oilman oilmen oilway oinked okapis okayed oldest oldies oldish oleate olefin oleine oleins oleums olives omasum ombers ombres omegas omelet omened omenta onager onagri onions oniony onrush onsets onside onuses onward onyxes oocyst oocyte oodles oogamy oogeny oohing oolite oolith oology oolong oomiac oomiak oompah oomphs oorali ootids oozier oozily oozing opaque opened opener openly operas operon ophite

Showing 150 of 325 words

7-Letter Words Starting With O(618)

oaklike oakmoss oarfish oarless oarlike oarlock oarsman oarsmen oatcake oatlike oatmeal obconic obelias obelise obelisk obelism obelize obesely obesity obeyers obeying obiisms objects oblasti oblasts oblates obliged obligee obliger obliges obligor oblique oblongs obloquy oboists obovate obovoid obscene obscure obsequy observe obtains obtests obtrude obtunds obtuser obverse obverts obviate obvious ocarina occiput occlude occults oceanic ocellar ocellus oceloid ocelots ochered ochreae ochring ochroid ochrous ocreate octadic octagon octanes octanol octants octaval octaves octavos octette octopod octopus octrois octuple octuply oculars oculist odalisk oddball oddment oddness odonate odorant odorful odorize odorous odyssey oedemas oedipal oenomel oersted oestrin oestrum oestrus oeuvres offbeat offcast offcuts offence offends offense offered offerer offeror offhand officer offices offings offload offramp offsets offside oftener ogdoads oghamic ogreish ogreism ogrisms ohmages oilbird oilcamp oilcans oilcups oilhole oiliest oilseed oilskin oilways oinking oinomel okaying oldness oldster oldwife oleates olefine olefins oleines olivary olivine ologies ologist oloroso omelets omening omental

Showing 150 of 618 words

8-Letter Words Starting With O(972)

oafishly oarlocks oatcakes oatmeals obduracy obdurate obeahism obedient obeisant obelised obelises obelisks obelisms obelized obelizes obeyable obituary objected objector oblately oblation oblatory obligate obligati obligato obligees obligers obliging obligors obliqued obliques oblivion oblongly obscener obscured obscurer obscures observed observer observes obsessed obsesses obsessor obsidian obsolete obstacle obstruct obtained obtainer obtected obtested obtruded obtruder obtrudes obtunded obturate obtusely obtusest obtusity obverses obverted obviable obviated obviates obviator obvolute ocarinas occasion occident occipita occiputs occluded occludes occlusal occulted occulter occultly occupant occupied occupier occupies occurred oceanaut ocellate ochering ocherous ochreous ocotillo octagons octangle octanols octantal octarchy octettes octonary octopods octoroon octupled octuples octuplet octuplex ocularly oculists odalisks oddballs oddities oddments odiously odograph odometer odometry odonates odontoid odorants odorized odorizes odorless odourful odysseys oecology oedemata oedipean oeillade oenology oenomels oersteds oestrins oestriol oestrone oestrous oestrums offbeats offcasts offences offended offender offenses offerers offering offerors officers official offishly offloads offprint offramps offshoot offshore offsides offstage

Showing 150 of 972 words

9-Letter Words Starting With O(922)

oakmosses oarfishes oarswoman oarswomen oasthouse obbligati obbligato obcordate obeahisms obedience obeisance obelising obelizing obesities obfuscate objectify objecting objection objective objectors objurgate oblations obligated obligates obligatos obliquely obliquing obliquity oblivions oblivious obloquies obnoxious obscenely obscenest obscenity obscurant obscurely obscurest obscuring obscurity obsequies observant observers observing obsessing obsession obsessive obsessors obsidians obsolesce obsoleted obsoletes obstacles obstetric obstinacy obstinate obstructs obtainers obtaining obtesting obtruders obtruding obtrusion obtrusive obtunding obturated obturates obturator obversely obverting obviating obviation obviators obviously occasions occidents occipital occluding occlusion occlusive occulters occulting occultism occultist occupancy occupants occupiers occupying occurrent occurring oceanaria oceanauts ochlocrat ocotillos octagonal octahedra octameter octangles octillion octoploid octopodes octopuses octoroons octothorp octuplets octupling ocularist odalisque oddnesses oddsmaker odographs odometers odontoids odorizing odorously oedipally oeillades oenophile oesophagi oestriols oestrones oestruses offenders offending offensive offerings offertory offhanded officered officials officiant officiary officiate officinal officious offloaded offprints offscreen offshoots offspring offstages oghamists ohmically ohmmeters oilcloths oilpapers oilstones ointments oiticicas okeydokey

Showing 150 of 922 words

10-Letter Words Starting With O(791)

oafishness oasthouses obbligatos obduracies obdurately obediences obediently obeisances obeisantly obfuscated obfuscates obituaries obituarist objections objectives objectless objurgated objurgates oblateness obligately obligating obligation obligatory obligingly obliterate obnubilate obscurants obsequious observable observably observance observants obsessions obsessives obsolesced obsolesces obsoletely obsoleting obstetrics obstructed obstructor obtainable obtainment obtrusions obturating obturation obturators obtuseness obtusities obviations occasional occasioned occidental occipitals occlusions occultisms occultists occupation occurrence occurrents oceanarium oceanfront oceangoing oceanology ochlocracy ochlocrats octahedral octahedron octameters octarchies octillions octonaries octoploids octothorps ocularists oculomotor odalisques oddsmakers odiousness odometries oecologies oenologies oenophiles oesophagus offensives officering officially officiants officiated officiates offishness offloading offprinted offsetting offsprings oftentimes oilinesses oinologies oldfangled oleaginous olecranons oleographs oleoresins olfactions oligarchic oligoclase oligomeric oligophagy oligopsony olivaceous olivenites olivinitic ololiuquis ommatidial ommatidium omnificent omnipotent omniranges omniscient omnivorous omophagies oncologies oncologist onionskins onomastics onslaughts ontogenies ontologies ontologist oozinesses opacifying opalescent opalescing opaqueness openhanded opennesses operagoers operagoing operations operatives operculars operculate operculums operettist ophiuroids ophthalmia ophthalmic oppilating opposeless oppositely

Showing 150 of 791 words

11-Letter Words Starting With O(591)

oarsmanship obfuscating obfuscation obfuscatory obituarists objectified objectifies objectively objectivism objectivist objectivity objurgating objurgation objurgatory obligations obliqueness obliquities obliterated obliterates obliterator obliviously obnoxiously obnubilated obnubilates obscenities obscurantic obscuration obscureness obscurities observables observances observantly observation observatory observingly obsessional obsessively obsolescent obsolescing obstetrical obstinacies obstinately obstructing obstruction obstructive obstructors obtainments obtrusively obturations obviousness occasioning occipitally occultation occupancies occupations occurrences oceanariums oceanfronts ochlocratic octagonally octahedrons octapeptide odontoblast odoriferous odorousness oecumenical offenseless offensively offertories offhandedly officialdom officialese officialism officiaries officiating officiation officiously offprinting offscouring oligarchies oligochaete oligoclases oligopolies ominousness omnifarious omnipotence omnipotents omnipresent omniscience oncogeneses oncogenesis oncological oncologists oneirically oneiromancy onerousness ongoingness onomatology ontogeneses ontogenesis ontogenetic ontological ontologists opalescence openability openhearted openmouthed operability operagoings operational operatively operculated operettists operoseness ophthalmias opinionated opportunely opportunism opportunist opportunity oppositions oppressions opprobrious opprobriums opsonifying optionality optokinetic optometries optometrist oracularity orangewoods orbicularly orchardists orchestrate ordainments orderliness ordinariest ordinations ordonnances organically organicisms organicists organizable orientalism orientalist orientalize orientating orientation originality originating

Showing 150 of 591 words

12-Letter Words Starting With O(419)

oafishnesses oarsmanships obdurateness obfuscations objectifying objectivisms objectivists objurgations oblanceolate oblatenesses obligatorily obligingness obliterating obliteration obliterative obliterators obnubilating obnubilation obscurantism obscurantist obscurations obsequiously observations obsolescence obsoleteness obstetrician obstreperous obstructions obstructives obtusenesses occasionally occidentally occultations occupational oceanography oceanologies oceanologist ochlocracies octahedrally octapeptides octogenarian octosyllabic octosyllable odiousnesses odontoblasts officeholder officialdoms officialeses officialisms officiations offishnesses offscourings oleaginously oleandomycin oleoresinous olfactometer oligarchical oligochaetes oligophagies oligophagous oligopsonies oligotrophic omnipotences omnipotently omnipresence omnisciences omnisciently omnivorously oncogenicity oncornavirus onomastician onomatopoeia onomatopoeic onychophoran oophorectomy opalescences opalescently opaquenesses openhandedly operatically operationism operationist operatorless opinionative opportunisms opportunists opposability oppositeness oppositional oppressively optimalities optimisation optimization optometrists oratorically orchestrally orchestrated orchestrater orchestrates orchestrator orchidaceous ordinariness organicities organisation organization organoleptic organologies orientalisms orientalists orientalized orientalizes orientations orienteering originations orismologies ornamentally ornatenesses ornerinesses ornithologic ornithopters orographical oropharynges oropharynxes orotundities orthocenters orthodontias orthodontics orthodontist orthogeneses orthogenesis orthogenetic orthogonally orthographic orthopaedics orthopedists orthopterans orthopterist orthopteroid orthorhombic orthotropous oscillations oscillograms oscillograph oscilloscope osmolalities osmolarities ossification ostentations ostentatious osteoblastic

Showing 150 of 419 words

13-Letter Words Starting With O(305)

objectionable objectionably objectiveness objectivistic objectivities obliquenesses obliterations obliviousness obnoxiousness obnubilations obscurantisms obscurantists obscurenesses observability observational observatories obsessionally obsessiveness obsolescences obsolescently obstetrically obstetricians obstinateness obstructively obtainability obtrusiveness obviousnesses occidentalize oceanographer oceanographic oceanologists ochlocratical octodecillion octogenarians octosyllabics octosyllables odontoblastic odontoglossum odoriferously odorousnesses offensiveness offhandedness officeholders officiousness oleandomycins oleomargarine olfactometers oligopolistic ombudsmanship ominousnesses omnicompetent omnipresences oneiromancies onerousnesses ongoingnesses onomastically onomasticians onomatologies onomatologist onomatopoeias onomatopoetic ontologically onychophorans openabilities openheartedly openmouthedly operabilities operationally operationisms operationists operativeness operosenesses ophthalmology opinionatedly opisthobranch opportuneness opportunistic opportunities oppositionist opprobriously optimisations optimizations optionalities oracularities orchestraters orchestrating orchestration orchestrators orderlinesses organisations organizations organogeneses organogenesis organogenetic orgiastically orientalizing orientational orienteerings originalities originatively orismological ornamentation ornithischian ornithologies ornithologist oropharyngeal orthodontists orthoepically orthogonality orthogonalize orthographies orthopterists orthopteroids oscillational oscillographs oscillography oscilloscopes oscilloscopic ossifications osteomalacias osteomyelitis osteoplasties osteosarcomas ototoxicities outbargaining outdelivering outdistancing outgeneraling outglittering outintriguing outmaneuvered outmanipulate outorganizing outperforming outplacements outpoliticked outpopulating outrebounding outreproduced outreproduces outspokenness outstandingly outstretching outwardnesses ovariectomies overabstracts overabundance overachievers overachieving overadvertise

Showing 150 of 305 words

14-Letter Words Starting With O(215)

obduratenesses objectlessness obligingnesses obsequiousness obsoletenesses obstreperously obstructionism obstructionist occidentalized occidentalizes occupationally oceanographers oceanographies octodecillions odontoglossums oleaginousness oleomargarines oligopsonistic ombudsmanships omnicompetence omphaloskepses omphaloskepsis onchocerciases onchocerciasis oncogenicities oncornaviruses onomatologists oophorectomies openhandedness operationalism operationalist ophthalmologic ophthalmoscope ophthalmoscopy opinionatively opisthobranchs opposabilities oppositenesses oppositionists oppressiveness optimistically optoelectronic orchestrations ordinarinesses organismically organizational organochlorine organometallic ornamentations ornithischians ornithological ornithologists orthochromatic orthogonalized orthogonalizes orthographical orthomolecular orthopedically orthophosphate oscillographic osmoregulation osmoregulatory ostentatiously osteoarthritic osteoarthritis osteosarcomata otolaryngology outdatednesses outgoingnesses outlandishness outmaneuvering outmanipulated outmanipulates outpoliticking outrageousness outreproducing outsidernesses ovariectomized overabstracted overabundances overaccentuate overactivities overadjustment overadvertised overadvertises overaggressive overanalytical overarticulate overassertions overassessment overattentions overcapacities overcapitalize overcautioning overcentralize overclassified overclassifies overcommitment overcommitting overcompensate overcompliance overcomplicate overcompressed overcompresses overconcerning overconfidence overconstructs overcontrolled overcorrecting overcorrection overdecorating overdecoration overdependence overdetermined overdeveloping overdiscounted overdocumented overdominances overdramatized overdramatizes overeducations overelaborated overelaborates overemphasized overemphasizes overencouraged overencourages overengineered overenthusiasm overestimating overestimation overevaluation overexaggerate overexercising overexpansions overexplaining overexploiting overextensions overextraction overfastidious overfertilized overfertilizes overfulfilling overgeneralize overgenerosity overgenerously overglamorized overglamorizes overharvesting overhomogenize

Showing 150 of 215 words

15-Letter Words Starting With O(159)

objectification objectivenesses obliviousnesses obnoxiousnesses observabilities observationally obsessivenesses obstinatenesses obstructionisms obstructionists obstructiveness obtainabilities obtrusivenesses occidentalizing oceanographical odoriferousness offensivenesses offhandednesses officiousnesses oligodendrocyte oligodendroglia oligomerization oligonucleotide oligosaccharide omnicompetences omnidirectional ontogenetically openheartedness openmouthedness operationalisms operationalists operativenesses ophthalmologies ophthalmologist ophthalmoscopes ophthalmoscopic opinionatedness opportunenesses opprobriousness optoelectronics orchestrational organochlorines organomercurial organometallics organophosphate orientationally orthodontically orthogonalities orthogonalizing orthophosphates orthopsychiatry oscillographies osmoregulations osteomyelitides osteopathically outdoorsmanship outmanipulating outspokennesses overabstracting overaccentuated overaccentuates overachievement overadjustments overadvertising overapplication overarticulated overarticulates overassessments overcapitalized overcapitalizes overcentralized overcentralizes overclassifying overcommitments overcommunicate overcompensated overcompensates overcompliances overcomplicated overcomplicates overcompressing overconfidences overconfidently overconstructed overconsumption overcontrolling overcorrections overcultivation overdecorations overdependences overdevelopment overdiscounting overdiversities overdocumenting overdramatizing overeagernesses overelaborating overelaboration overembellished overembellishes overemphasizing overencouraging overengineering overentertained overenthusiasms overestimations overevaluations overexaggerated overexaggerates overexpectation overextractions overextravagant overfamiliarity overfertilizing overgeneralized overgeneralizes overglamorizing overhomogenized overhomogenizes overidentifying overimaginative overindulgences overingenuities overintensities overinvestments overlengthening overmedications overopinionated overorchestrate overornamenting overpersuasions overpopulations overprescribing overproductions overprogramming overproportions overprotections overrefinements overregulations overrepresented oversaturations oversensitivity oversimplifying overspecialized overspecializes overspeculating overspeculation overstabilities overstimulating overstimulation

Showing 150 of 159 words

About Words Starting With O

O is worth 1 Scrabble point but powers essential prefixes: OBEY (to follow) creates OBEYING, OBEDIENCE. OBJECT (throw before) creates OBJECTOR, OBJECTED, OBJECTION. OBLIGE (bind) creates OBLIGED, OBLIGATION, OBLIGING. OBSCURE (cover) creates OBSCURED, OBSCURITY. OCCUPY (take) creates OCCUPIED, OCCUPANT, OCCUPATION. OCCUR (run) creates OCCURRED, OCCURRENCE, OCCURRING. OFFER (carry) creates OFFERED, OFFERING, OFFERINGS. O- starting words themselves (OR, OF, ON) are among the most common English connectives. In Scrabble, O is essential as a vowel and for OR-, OF- extensions.

•OB-, OC-, OF- prefixes create valuable O-starting plays worth 3-6+ points.
•O as OL- (OLD), OX- (OXEN), OW- (OWED) creates flexible hooks to many letters.
•O connects nearly everywhere — use O-extensions for converting low-scoring plays.

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