305 words
13-letter words starting with O
305 words.
- overemphasize32
- overcivilized31
- oxyhemoglobin31
- objectionably29
- objectivistic29
- overanalyzing29
- overbejeweled29
- overqualified29
- overdramatize28
- overfertilize28
- overglamorize28
- overzealously28
- objectiveness27
- objectivities27
- occidentalize27
- ophthalmology27
- overexpanding27
- overidealized27
- overorganized27
- objectionable26
- onychophorans26
- optimizations26
- orthogonalize26
- overexercised26
- overexplained26
- overexploited26
- overidealizes26
- overorganizes26
- overpackaging26
- overutilizing26
- overwithholds26
- officeholders25
- ombudsmanship25
- opisthobranch25
- overachieving25
- overexercises25
- overexpansion25
- overexposures25
- overextending25
- overexuberant25
- obliquenesses24
- offhandedness24
- openmouthedly24
- oscillography24
- outorganizing24
- overachievers24
- overamplified24
- overbleaching24
- overshadowing24
- oversupplying24
- overweighting24
- ovoviviparous24
- observability23
- obstructively23
- oceanographic23
- organizations23
- orientalizing23
- orthoepically23
- overanxieties23
- overcommitted23
- overdeveloped23
- overdiversity23
- overembellish23
- overexertions23
- overextension23
- overfulfilled23
- overharvested23
- overtalkative23
- overtaxations23
- overweeningly23
- oystercatcher23
- obnoxiousness22
- ochlocratical22
- octosyllabics22
- offensiveness22
- openheartedly22
- opprobriously22
- oropharyngeal22
- orthographies22
- ototoxicities22
- outpoliticked22
- overbearingly22
- overborrowing22
- overbreathing22
- overconfident22
- overfocussing22
- overinforming22
- overlordships22
- overmedicated22
- overoptimisms22
- overprescribe22
- overproducing22
- overprogramed22
- overservicing22
- overstretched22
- oversubscribe22
- oxaloacetates22
- oceanographer21
- officiousness21
- oleandomycins21
- omnicompetent21
- ornithischian21
- oscillographs21
- oscilloscopic21
- outperforming21
- overabundance21
- overbalancing21
- overconcerned21
- overconsuming21
- overcorrected21
- overdemanding21
- overdocuments21
- overdominance21
- overgoverning21
- overimpressed21
- overmedicates21
- overpopulated21
- overprocessed21
- overpromising21
- overpromoting21
- overprotected21
- overslaughing21
- overstability21
- overstretches21
- overtightened21
- obsolescently20
- obstetrically20
- obtainability20
- octosyllables20
- odoriferously20
- olfactometers20
- onomastically20
- originatively20
- orthogonality20
- ovariectomies20
- overabstracts20
- overadvertise20
- overambitious20
- overburdening20
- overconscious20
- overconstruct20
- overdecorated20
- overdependent20
- overdirecting20
- overeducating20
- overimpresses20
- overinflating20
- overingenuity20
- overlengthens20
- overmodulated20
- overnourished20
- overoptimists20
- overpedalling20
- overpersuaded20
- overpopulates20
- overprocesses20
- overresponded20
- overspeculate20
- overspreading20
- oversweetened20
- overwintering20
- obscurantisms19
- obsolescences19
- omnipresences19
- onomatopoetic19
- ontologically19
- opinionatedly19
- opportunistic19
- orchestrating19
- orgiastically19
- orthopteroids19
- oscilloscopes19
- outmaneuvered19
- outplacements19
- outreproduced19
- outspokenness19
- outstretching19
- overassertive19
- overcautioned19
- overcredulous19
- overdecorates19
- overdesigning19
- overdiscounts19
- overeducation19
- overencourage19
- overenergetic19
- overestimated19
- overindulging19
- overinflation19
- overintensity19
- overmastering19
- overnourishes19
- overoperating19
- overpersuades19
- overreporting19
- oversensitive19
- overseriously19
- oversweetness19
- overvaluation19
- obliviousness18
- observational18
- observatories18
- obsessionally18
- obsessiveness18
- obtrusiveness18
- obviousnesses18
- octodecillion18
- odontoblastic18
- oligopolistic18
- operationally18
- operativeness18
- orchestraters18
- orchestration18
- orchestrators18
- orismological18
- orthopterists18
- ossifications18
- osteomyelitis18
- outdelivering18
- outpopulating18
- outreproduces18
- outstandingly18
- overarranging18
- overelaborate18
- overemotional18
- overestimates18
- overindulgent18
- overissuances18
- overornaments18
- overpressures18
- overreactions18
- overregulated18
- overreliances18
- oversecretion18
- overstatement18
- overstimulate18
- overtreatment18
- ovipositional18
- obnubilations17
- obscurantists17
- obscurenesses17
- obstetricians17
- odontoglossum17
- oneiromancies17
- onomasticians17
- onomatopoeias17
- openabilities17
- operabilities17
- operationisms17
- opportuneness17
- opportunities17
- oppositionist17
- optimisations17
- organogenetic17
- ornithologies17
- ornithologist17
- orthodontists17
- osteomalacias17
- osteosarcomas17
- outbargaining17
- outdistancing17
- outmanipulate17
- outrebounding17
- outwardnesses17
- overasserting17
- overeagerness17
- overengineers17
- overingenious17
- overregulates17
- oversaturated17
- overstraining17
- overstressing17
- oceanologists16
- octogenarians16
- oleomargarine16
- onomatologies16
- onomatologist16
- overassertion16
- overattention16
- overinsistent16
- overnutrition16
- oversaturates16
- obliterations15
- obstinateness15
- ominousnesses15
- ongoingnesses15
- operationists15
- operosenesses15
- optionalities15
- oracularities15
- organogeneses15
- organogenesis15
- ornamentation15
- oscillational15
- osteoplasties15
- outgeneraling15
- outglittering15
- outintriguing15
- odorousnesses14
- orderlinesses14
- organisations14
- orienteerings14
- originalities14
- onerousnesses13
- orientational13
How this list is built
- Every word here comes from ENABLE, a lexicon released to the public domain — 172,823 words. It is the list this site can legally publish in full, and it is stated openly rather than implied.
- The tournament lists — TWL/OWL in North America, Collins/SOWPODS elsewhere — are copyrighted compilations. They are not used here and not merged in. A small number of words will therefore differ from what a given game accepts.
- Scores use the standard tile values (A=1 … Q=10, Z=10) and ignore board bonuses, which depend on where you place the word, not on the word itself.
- Lists are ordered by score, then alphabetically — the order that is useful when you are choosing a play, rather than alphabetical for its own sake.
SOURCE·ENABLE (Enhanced North American Benchmark Lexicon)·Public domain. 172,823 words. Tournament lists (TWL, Collins) are copyrighted and not used.·REVIEWED AUG 2026
SOURCE·ENABLE public-domain lexicon (172,823 words)·lists and scores computed from the lexicon, see method·REVIEWED AUG 2026
