12 Letter Words Starting With O
There are 509 twelve-letter words starting with O, valid in Scrabble and shown with their point values.
- oafishnesses18
- oarsmanships19
- obdurateness15
- obfuscations19
- objectifying30
- objectivised27
- objectivises26
- objectivisms28
- objectivists26
- objectivized36
- objectivizes35
- objurgations22
- oblanceolate16
- oblatenesses14
- obligational15
- obligatorily18
- obligingness16
- obliterating15
- obliteration14
- obliterative17
- obliterators14
- obnubilating17
- obnubilation16
- obscurantism18
- obscurantist16
- obscurations16
- obsequiously26
- observations17
- obsolescence18
- obsoleteness14
- obstetrician16
- obstreperous16
- obstructions16
- obstructives19
- obtusenesses14
- occasionally19
- occidentally20
- occultations16
- occupational18
- oceanography23
- oceanologies15
- oceanologist15
- ochlocracies21
- octahedrally21
- octapeptides19
- octogenarian15
- octosyllabic21
- octosyllable19
- odiousnesses13
- odontoblasts15
- odontologies14
- odontologist14
- oenophilists17
- oesophagitis18
- oesophaguses18
- officeholder24
- officialdoms23
- officialeses20
- officialisms22
- officiations20
- offishnesses21
- offscourings21
- olallieberry17
- oleaginously16
- oleandomycin20
- oleographies18
- oleoresinous12
- olericulture14
- olfactometer19
- oligarchical20
- oligochaetes18
- oligophagies19
- oligophagous19
- oligopolists15
- oligopsonies15
- oligotrophic20
- ombudsperson19
- omnipotences18
- omnipotently19
- omnipresence18
- omnisciences18
- omnisciently19
- omnivorously20
- oncogenicity20
- oncornavirus17
- onomastician16
- onomatopoeia16
- onomatopoeic18
- onychophoran25
- oophorectomy24
- opalescences18
- opalescently19
- opaquenesses23
- openhandedly22
- operatically19
- operationism16
- operationist14
- operatorless14
- ophidiophobe25
- opinionative17
- opportunisms18
- opportunists16
- opposability21
- oppositeness16
- oppositional16
- oppressively22
- opsonization23
- optimalities16
- optimisation16
- optimization25
- optometrists16
- oratorically17
- orchardgrass19
- orchestrally20
- orchestrated18
- orchestrater17
- orchestrates17
- orchestrator17
- orchidaceous20
- ordinariness13
- orecchiettes19
- organicities15
- organisation13
- organization22
- organoleptic17
- organologies14
- orgasmically20
- orientalised13
- orientalises12
- orientalisms14
- orientalists12
- orientalized22
- orientalizes21
- orientations12
- orienteering13
- originalisms15
- originalists13
- originations13
- orismologies15
- ornamentally17
- ornatenesses12
- ornerinesses12
- ornithologic18
- ornithopters17
- orographical20
- oropharynges21
- oropharynxes27
- orotundities13
- orthocenters17
- orthodontias16
- orthodontics18
- orthodontist16
- orthogeneses16
- orthogenesis16
- orthogenetic18
- orthogonally19
- orthographer21
- orthographic23
- orthopaedics20
- orthopaedist18
- orthopedists18
- orthopterans17
- orthopterist17
- orthopteroid18
- orthopterous17
- orthorhombic24
- orthotropous17
- oscillations14
- oscillograms17
- oscillograph20
- oscilloscope18
- oseltamivirs17
- osmolalities14
- osmolarities14
- ossification17
- ostentations12
- ostentatious12
- osteoblastic16
- osteoclastic16
- osteogeneses13
- osteogenesis13
- osteogenetic15
- osteological15
- osteologists13
- osteomalacia16
- osteomalacic18
- osteopathies17
- osteoplastic16
- osteoporoses14
- osteoporosis14
- osteoporotic16
- osteosarcoma16
- ostracoderms17
- otherworldly22
- otiosenesses12
- otoscleroses14
- otosclerosis14
- outachieving21
- outbalancing17
- outbargained16
- outbrazening24
- outbreedings16
- outbuildings16
- outcavilling18
- outcompeting19
- outcroppings19
- outdatedness14
- outdelivered17
- outdesigning15
- outdistanced16
- outdistances15
- outercourses14
- outgalloping16
- outgeneraled14
- outglittered14
- outgoingness14
- outintrigued14
- outintrigues13
- outjockeying29
- outlandishly19
- outmaneuvers17
- outmanoeuvre17
- outmastering15
- outnumbering17
- outorganized23
- outorganizes22
- outperformed20
- outplacement18
- outpoliticks20
- outpopulated17
- outpopulates16
- outpreaching20
- outproducing18
- outpromising17
- outrageously16
- outreasoning13
- outrebounded16
- outreckoning19
- outreproduce17
- outrightness16
- outrivalling16
- outscreaming17
- outsiderness13
- outsourcings15
- outsparkling19
- outspreading16
- outspringing16
- outsprinting15
- outstretched18
- outstretches17
- outstripping17
- outthrobbing20
- outthrusting16
- outtraveling16
- outtravelled16
- outwrestling16
- ovariotomies17
- overabstract19
- overabundant18
- overachieved24
- overachiever23
- overachieves23
- overactivity23
- overadjusted24
- overanalyses18
- overanalysis18
- overanalyzed28
- overanalyzes27
- overarousals15
- overarranged17
- overarranges16
- overasserted16
- overassessed16
- overassesses15
- overbalanced20
- overbalances19
- overbleached23
- overbleaches22
- overblowings21
- overborrowed21
- overbreathed21
- overbreathes20
- overbreeding19
- overbriefing21
- overbrowsing21
- overbuilding19
- overburdened19
- overcapacity24
- overcastings18
- overcautions17
- overcautious17
- overcharging22
- overchilling21
- overclaiming20
- overclassify23
- overcleaning18
- overclearing18
- overclocking24
- overclouding19
- overcoaching23
- overcoloring18
- overcompress21
- overconcerns19
- overconsumed20
- overconsumes19
- overcontrols17
- overcorrects19
- overcounting18
- overcramming22
- overcritical19
- overcropping22
- overcrowding22
- overcuttings18
- overdecorate18
- overdesigned18
- overdevelops21
- overdiagnose17
- overdirected19
- overdiscount18
- overdocument20
- overdominant18
- overdramatic20
- overdressing17
- overdrinkers20
- overdrinking21
- overeducated19
- overeducates18
- overemphases22
- overemphasis22
- overemphatic24
- overenamored18
- overengineer16
- overenrolled16
- overequipped29
- overestimate17
- overevaluate18
- overexciting25
- overexercise24
- overexerting23
- overexertion22
- overexpanded26
- overexplains24
- overexplicit26
- overexploits24
- overexposing25
- overexposure24
- overextended24
- overfamiliar20
- overfatigued20
- overfatigues19
- overfavoring22
- overfishings22
- overflooding20
- overfocusing21
- overfocussed21
- overfocusses20
- overfondness19
- overfulfills21
- overgarments18
- overgenerous16
- overgoverned20
- overgrazings26
- overhandling20
- overharvests21
- overheatings19
- overhonoring19
- overhuntings19
- overidealize25
- overidentify22
- overindebted19
- overindulged18
- overindulges17
- overinflated19
- overinflates18
- overinformed21
- overinvested19
- overissuance17
- overlaboring18
- overlaboured18
- overlappings20
- overlavished22
- overlavishes21
- overlearning16
- overlengthen19
- overlighting20
- overliterary18
- overlordship21
- overmanagers18
- overmanaging19
- overmannered18
- overmannings18
- overmastered18
- overmatching23
- overmaturity20
- overmedicate20
- overmodestly21
- overniceness17
- overnighters19
- overnighting20
- overoperated18
- overoperates17
- overoptimism21
- overoptimist19
- overorganize25
- overornament17
- overpackaged25
- overpackages24
- overpainting18
- overpayments22
- overpedaling19
- overpedalled19
- overpeopling20
- overpersuade18
- overplanning18
- overplanting18
- overplotting18
- overpopulate19
- overpowering21
- overpraising18
- overpredicts20
- overprepared20
- overpressure17
- overprinting18
- overproduced21
- overproduces20
- overprograms20
- overpromised20
- overpromises19
- overpromoted20
- overpromotes19
- overprotects19
- overreachers20
- overreaching21
- overreacting18
- overreaction17
- overrefining19
- overregulate16
- overreliance17
- overreported18
- overresponds18
- overripeness17
- overroasting16
- oversampling20
- oversanguine16
- oversaturate15
- overschedule21
- oversecreted18
- oversecretes17
- overserviced21
- overservices20
- overshadowed23
- overshooting19
- oversimplify25
- overslaughed20
- oversleeping18
- overslipping20
- overspenders18
- overspending19
- overspilling18
- overstaffing22
- oversteering16
- overstepping20
- overstirring16
- overstocking22
- overstrained16
- overstressed16
- overstresses15
- overstrewing19
- overstridden17
- overstriding17
- overstudying20
- overstuffing22
- oversupplied20
- oversupplies19
- oversweetens18
- overswinging20
- overtaxation22
- overteaching21
- overthinkers22
- overthinking23
- overthinning19
- overthrowing22
- overtightens19
- overtraining16
- overtreating16
- overtrimming20
- overtrumping20
- overutilized25
- overutilizes24
- overvoltages19
- overwatching24
- overwatering19
- overwearying22
- overweighing23
- overweighted23
- overwhelming24
- overwintered19
- overwithheld25
- overwithhold25
- overwritings19
- ovipositions17
- owlishnesses18
- oxalacetates21
- oxaloacetate21
- oxidizations29
- oxyacetylene27
- oxygenations23
- ozonizations30
- ozonospheres26
Looking for twelve-letter words that begin with the letter O? This complete list is drawn from the official Scrabble dictionary. Twelve-letter words are especially useful for Wordle and for setting up high-scoring plays. Click any word to see its definition, points and anagrams.
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Frequently asked questions
How many 12-letter words start with O?+
There are 509 valid 12-letter words starting with O in the Scrabble (TWL) dictionary.
What is the highest-scoring 12-letter word starting with O?+
OBJECTIVIZED is the highest-scoring 12-letter word starting with O.
