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13 letter words starting with the letter O
Words that Start with O, 13 Letters Long – Complete List
- objectionable[26]
- objectionably[29]
- objectivating[28]
- objectivation[27]
- objectiveness[27]
- objectivising[28]
- objectivistic[29]
- objectivities[27]
- objectivizing[37]
- obliquenesses[24]
- obliterations[15]
- obliviousness[18]
- obliviscences[22]
- obmutescences[21]
- obnoxiousness[22]
- obnubilations[17]
- obscenenesses[17]
- obscurantisms[19]
- obscurantists[17]
- obscurenesses[17]
- observability[23]
- observational[18]
- observatories[18]
- obsessionally[18]
- obsessionists[15]
- obsessiveness[18]
- obsolescences[19]
- obsolescently[20]
- obstetrically[20]
- obstetricians[17]
- obstinateness[15]
- obstreperated[18]
- obstreperates[17]
- obstructional[17]
- obstructively[23]
- obtainability[20]
- obtemperating[20]
- obtrusiveness[18]
- obviousnesses[18]
- occasionalism[19]
- occasionalist[17]
- occasionality[20]
- occidentalise[18]
- occidentalism[20]
- occidentalist[18]
- occidentalize[27]
- occlusiveness[20]
- oceanographer[21]
- oceanographic[23]
- oceanological[18]
- oceanologists[16]
- ochlocratical[22]
- ochlophobiacs[27]
- octingenaries[16]
- octocentenary[20]
- octodecillion[18]
- octogenarians[16]
- octosyllabics[22]
- octosyllables[20]
- odonatologies[15]
- odonatologist[15]
- odontoblastic[18]
- odontoglossum[17]
- odontological[17]
- odontologists[15]
- odontophobias[21]
- odontophorous[19]
- odontornithes[17]
- odoriferously[20]
- odorousnesses[14]
- oecologically[21]
- oecumenically[22]
- offensiveness[22]
- offhandedness[24]
- officeholders[25]
- officialities[21]
- officiousness[21]
- oleandomycins[21]
- oleomargarine[16]
- oleomargarins[16]
- olfactologies[19]
- olfactologist[19]
- olfactometers[20]
- oligopeptides[19]
- oligopolistic[18]
- oligospermias[18]
- oligotrophies[19]
- ombudsmanship[25]
- ominousnesses[15]
- ommatophorous[22]
- omnicompetent[21]
- omnifariously[21]
- omniformities[20]
- omnipotencies[19]
- omnipresences[19]
- omoplatoscopy[24]
- oneirocritics[17]
- oneiromancers[17]
- oneiromancies[17]
- oneiroscopies[17]
- oneiroscopist[17]
- onerousnesses[13]
- ongoingnesses[15]
- onomastically[20]
- onomasticians[17]
- onomatologies[16]
- onomatologist[16]
- onomatopoeias[17]
- onomatopoeses[17]
- onomatopoesis[17]
- onomatopoetic[19]
- ontogenically[19]
- ontologically[19]
- onychomancies[25]
- onychophagies[27]
- onychophagist[27]
- onychophorans[26]
- openabilities[17]
- openheartedly[22]
- openmouthedly[24]
- operabilities[17]
- operationally[18]
- operationisms[17]
- operationists[15]
- operativeness[18]
- operativities[18]
- operosenesses[15]
- ophiomorphous[25]
- ophiophilists[23]
- ophthalmology[27]
- opinionatedly[19]
- opisthobranch[25]
- opisthographs[24]
- opisthography[27]
- opisthosomata[20]
- oppignerating[19]
- oppignorating[19]
- oppignoration[18]
- opportuneness[17]
- opportunistic[19]
- opportunities[17]
- oppositionist[17]
- opprobriously[22]
- opsonisations[15]
- opsonizations[24]
- optimisations[17]
- optimizations[26]
- optionalities[15]
- oracularities[15]
- oraculousness[15]
- orchesography[27]
- orchestralist[18]
- orchestraters[18]
- orchestrating[19]
- orchestration[18]
- orchestrators[18]
- orchidologies[20]
- orchidologist[20]
- orchidomaniac[23]
- orchidomanias[21]
- orchiectomies[22]
- orderlinesses[14]
- oreographical[21]
- organisations[14]
- organizations[23]
- organogeneses[15]
- organogenesis[15]
- organogenetic[17]
- organographic[22]
- organological[17]
- organologists[15]
- organotherapy[22]
- orgiastically[19]
- orientalising[14]
- orientalities[13]
- orientalizing[23]
- orientational[13]
- orienteerings[14]
- originalities[14]
- originatively[20]
- orismological[18]
- ornamentation[15]
- ornithichnite[21]
- ornithischian[21]
- ornithogalums[19]
- ornithologies[17]
- ornithologist[17]
- ornithomantic[20]
- ornithomorphs[23]
- ornithophobia[23]
- oropharyngeal[22]
- orthocephalic[25]
- orthodiagonal[18]
- orthodontists[17]
- orthoepically[23]
- orthognathies[20]
- orthognathism[22]
- orthognathous[20]
- orthogonalise[17]
- orthogonality[20]
- orthogonalize[26]
- orthographers[22]
- orthographies[22]
- orthographist[22]
- orthohydrogen[24]
- orthopaedical[21]
- orthopaedists[19]
- orthopinakoid[23]
- orthopterists[18]
- orthopteroids[19]
- orthopyroxene[28]
- orthosilicate[18]
- orthostichies[21]
- orthostichous[21]
- orthotropisms[20]
- orthotungstic[19]
- oscillational[15]
- oscillographs[21]
- oscillography[24]
- oscilloscopes[19]
- oscilloscopic[21]
- ossifications[18]
- osteichthyans[24]
- ostensibility[18]
- osteofibroses[18]
- osteofibrosis[18]
- osteographies[19]
- osteomalacial[17]
- osteomalacias[17]
- osteomyelitis[18]
- osteopathists[18]
- osteopetroses[15]
- osteopetrosis[15]
- osteoplasties[15]
- osteosarcomas[17]
- ostreiculture[15]
- ostreophagies[19]
- ostreophagous[19]
- otherworldish[23]
- ototoxicities[22]
- outbargaining[17]
- outblustering[16]
- outdelivering[18]
- outdistancing[17]
- outgeneraling[15]
- outgeneralled[15]
- outglittering[15]
- outintriguing[15]
- outmaneuvered[19]
- outmanipulate[17]
- outmanoeuvred[19]
- outmanoeuvres[18]
- outorganising[15]
- outorganizing[24]
- outpassioning[16]
- outperforming[21]
- outplacements[19]
- outpoliticked[22]
- outpopulating[18]
- outrebounding[17]
- outrecuidance[18]
- outreproduced[19]
- outreproduces[18]
- outsettlement[15]
- outspokenness[19]
- outstandingly[18]
- outstretching[19]
- outsweetening[17]
- outtravelling[17]
- outvillaining[17]
- outwardnesses[17]
- ovariectomies[20]
- ovariotomists[18]
- overabounding[20]
- overabundance[21]
- overachievers[24]
- overachieving[25]
- overadvertise[20]
- overambitious[20]
- overamplified[24]
- overanalysing[20]
- overanalyzing[29]
- overanxieties[23]
- overarranging[18]
- overasserting[17]
- overassertion[16]
- overassertive[19]
- overattention[16]
- overattentive[19]
- overbalancing[21]
- overbearingly[22]
- overbejeweled[29]
- overbleaching[24]
- overborrowing[22]
- overbreathing[22]
- overburdening[20]
- overburthened[22]
- overcanopying[24]
- overcivilised[22]
- overcivilized[31]
- overcolouring[19]
- overcommitted[23]
- overconcerned[21]
- overconfident[22]
- overconscious[20]
- overconstruct[20]
- overconsuming[21]
- overcorrected[21]
- overcredulity[22]
- overcredulous[19]
- overcrowdings[23]
- overdecorated[20]
- overdecorates[19]
- overdemanding[21]
- overdependent[20]
- overdesigning[19]
- overdeveloped[23]
- overdeviating[21]
- overdirecting[20]
- overdiscounts[19]
- overdiversity[23]
- overdocuments[21]
- overdominance[21]
- overdramatise[19]
- overdramatize[28]
- overeagerness[17]
- overeducating[20]
- overeducation[19]
- overelaborate[18]
- overembellish[23]
- overemotional[18]
- overemphasise[23]
- overemphasize[32]
- overencourage[19]
- overenergetic[19]
- overengineers[17]
- overestimated[19]
- overestimates[18]
- overexcitable[27]
- overexercised[26]
- overexercises[25]
- overexertions[23]
- overexpanding[27]
- overexpansion[25]
- overexplained[26]
- overexploited[26]
- overexposures[25]
- overextending[25]
- overextension[23]
- overexuberant[25]
- overfertilise[19]
- overfertilize[28]
- overflowingly[26]
- overfocussing[22]
- overfulfilled[23]
- overfulnesses[19]
- overglamorise[19]
- overglamorize[28]
- overgoverning[21]
- overharvested[23]
- overhastiness[19]
- overidealised[18]
- overidealises[17]
- overidealized[27]
- overidealizes[26]
- overimpressed[21]
- overimpresses[20]
- overindulgent[18]
- overindulging[19]
- overinflating[20]
- overinflation[19]
- overinforming[22]
- overingenious[17]
- overingenuity[20]
- overinsistent[16]
- overinsurance[18]
- overintensity[19]
- overissuances[18]
- overlabouring[19]
- overlaunching[22]
- overleavening[20]
- overlengthens[20]
- overlordships[22]
- overmastering[19]
- overmeasuring[19]
- overmedicated[22]
- overmedicates[21]
- overmultitude[19]
- overnourished[20]
- overnourishes[19]
- overnutrition[16]
- overoperating[19]
- overoptimisms[22]
- overoptimists[20]
- overorganised[18]
- overorganises[17]
- overorganized[27]
- overorganizes[26]
- overornaments[18]
- overpackaging[26]
- overpedalling[20]
- overpersuaded[20]
- overpersuades[19]
- overpicturing[21]
- overpopulated[21]
- overpopulates[20]
- overpreparing[21]
- overprescribe[22]
- overpressures[18]
- overprocessed[21]
- overprocesses[20]
- overproducing[22]
- overprogramed[22]
- overpromising[21]
- overpromoting[21]
- overprotected[21]
- overqualified[29]
- overreactions[18]
- overreckoning[23]
- overregulated[18]
- overregulates[17]
- overreliances[18]
- overreporting[19]
- overresponded[20]
- oversaturated[17]
- oversaturates[16]
- oversecretion[18]
- oversensitive[19]
- overseriously[19]
- overservicing[22]
- overshadowing[24]
- overshowering[23]
- overslaughing[21]
- overspeculate[20]
- overspreading[20]
- overstability[21]
- overstatement[18]
- overstimulate[18]
- overstraining[17]
- overstressing[17]
- overstretched[22]
- overstretches[21]
- oversubscribe[22]
- oversupplying[24]
- oversweetened[20]
- oversweetness[19]
- overtalkative[23]
- overtaxations[23]
- overthwarting[23]
- overtightened[21]
- overtreatment[18]
- overutilising[17]
- overutilizing[26]
- overvaluation[19]
- overweathered[23]
- overweeningly[23]
- overweighting[24]
- overwhelmings[25]
- overwintering[20]
- overwithholds[26]
- overwrestling[20]
- ovipositional[18]
- ovoviviparity[27]
- ovoviviparous[24]
- oxaloacetates[22]
- oxyacetylenes[28]
- oxyhemoglobin[31]
- oxyrhynchuses[34]
- oystercatcher[23]
13-Letter Words Starting with O: Common Questions
What are the 13-letter words that start with O?
According to the English dictionary, there are 469 words with 13 letters that begin with the letter O. These words are valid for games like Scrabble and Words with Friends.
Which letters appear most frequently in 13-letter words starting with O?
The most common letters in these 13-letter words are: O, E, I, R, S. It's useful to remember these as they often appear in random letter selections.
What are the least frequent letters in 13-letter words starting with O?
In this group of 13-letter words, the rarest letters are: Q, K, J, Z, W. While they might not appear often, using them can score you more points in word games.
Where can I find 13-letter words starting with O that contain a specific letter in the middle?
You can use our search tool to specify the length of the word (13), the starting letter (O), and also indicate any letters that must be present within the word. This is a very helpful feature for forming words in various scenarios.
Discover all thirteen-letter words starting with the letter O
Find every 13-letter English word starting with the letter 'o'. This specialized list is designed for avid word gamers, including Scrabble players, Words With Friends enthusiasts, and anyone looking to enhance their vocabulary. Our focused collection presents words that are validated by reputable sources including the TWL, SOWPODS, and the Words With Friends dictionary, ensuring you have the most accurate options at your fingertips.
This specific combination of starting with 'o' and being 13 letters long is incredibly useful for players who need to strategically place words on the board or who are working with particular constraints. Whether you're looking to fill a gap in your game or searching for a word to make a high-scoring play in Scrabble or WWF, knowing these precise 13-letter words can be a game changer. Pair this knowledge with our powerful tools like the Scrabble solver or anagram generator to maximize your gameplay.
13-letter words starting with O – additional categories
Find all 13-letter words starting with the letter O. You can filter them by ending letter or by a letter contained inside.