Found 301 13-letter words starting with O
Highest Scrabble Score
The highest scoring 13-letter word starting with O in Scrabble:
OVEREMPHASIZE32 ptsHighest Words With Friends Score
The highest scoring 13-letter word starting with O in WWF:
OVERCIVILIZED35 ptsAbout 13-Letter Words Starting With O
This list contains valid 13-letter words that begin with O. Longer words score higher in Scrabble due to premium tiles and the 50-point bingo bonus. Each word links to its definition page with anagrams and game scores.
13-Letter Words Starting With O
overemphasize32overcivilized31oxyhemoglobin31objectionably29objectivistic29overanalyzing29overbejeweled29overqualified29overdramatize28overfertilize28overglamorize28objectiveness27objectivities27occidentalize27ophthalmology27overexpanding27overidealized27overorganized27objectionable26onychophorans26optimizations26orthogonalize26overexercised26overexplained26overexploited26overidealizes26overorganizes26overpackaging26overutilizing26overwithholds26officeholders25ombudsmanship25opisthobranch25overachieving25overexercises25overexpansion25overexposures25overextending25overexuberant25obliquenesses24offhandedness24openmouthedly24oscillography24outorganizing24overachievers24overamplified24overbleaching24overshadowing24oversupplying24overweighting24ovoviviparous24observability23oceanographic23organizations23orientalizing23orthoepically23overanxieties23overcommitted23overdeveloped23overdiversity23overembellish23overexertions23overextension23overfulfilled23overharvested23overtalkative23overtaxations23overweeningly23oystercatcher23obnoxiousness22ochlocratical22octosyllabics22offensiveness22openheartedly22opprobriously22oropharyngeal22orthographies22ototoxicities22outpoliticked22overbearingly22overborrowing22overbreathing22overconfident22overfocussing22overinforming22overlordships22overmedicated22overoptimisms22overprescribe22overproducing22overprogramed22overservicing22overstretched22oversubscribe22oxaloacetates22oceanographer21officiousness21oleandomycins21omnicompetent21ornithischian21oscillographs21oscilloscopic21outperforming21overabundance21overbalancing21overconcerned21overconsuming21overcorrected21overdemanding21overdocuments21overdominance21overgoverning21overimpressed21overmedicates21overpopulated21overprocessed21overpromising21overpromoting21overprotected21overslaughing21overstability21overstretches21overtightened21obsolescently20obstetrically20obtainability20octosyllables20odoriferously20olfactometers20onomastically20originatively20orthogonality20ovariectomies20overadvertise20overambitious20overburdening20overconscious20overconstruct20overdecorated20overdependent20overdirecting20overeducating20overimpresses20overinflating20overingenuity20overlengthens20overnourished20overoptimists20overpedalling20overpersuaded20overpopulates20overprocesses20overresponded20overspeculate20overspreading20oversweetened20overwintering20obscurantisms19obsolescences19omnipresences19onomatopoetic19ontologically19opinionatedly19opportunistic19orchestrating19orgiastically19orthopteroids19oscilloscopes19outmaneuvered19outplacements19outreproduced19outspokenness19outstretching19overassertive19overcredulous19overdecorates19overdesigning19overdiscounts19overeducation19overencourage19overenergetic19overestimated19overindulging19overinflation19overintensity19overmastering19overnourishes19overoperating19overpersuades19overreporting19oversensitive19overseriously19oversweetness19overvaluation19obliviousness18observational18observatories18obsessionally18obsessiveness18obtrusiveness18obviousnesses18octodecillion18odontoblastic18oligopolistic18operationally18operativeness18orchestraters18orchestration18orchestrators18orismological18orthopterists18ossifications18osteomyelitis18outdelivering18outpopulating18outreproduces18outstandingly18overarranging18overelaborate18overemotional18overestimates18overindulgent18overissuances18overornaments18overpressures18overreactions18overregulated18overreliances18oversecretion18overstatement18overstimulate18overtreatment18ovipositional18obnubilations17obscurantists17obscurenesses17obstetricians17odontoglossum17oneiromancies17onomasticians17onomatopoeias17openabilities17operabilities17operationisms17opportuneness17opportunities17oppositionist17optimisations17organogenetic17ornithologies17ornithologist17orthodontists17osteomalacias17osteosarcomas17outbargaining17outdistancing17outmanipulate17outrebounding17outtravelling17outwardnesses17overasserting17overeagerness17overengineers17overingenious17overregulates17oversaturated17overstraining17overstressing17oceanologists16octogenarians16oleomargarine16onomatologies16onomatologist16overassertion16overattention16overinsistent16overnutrition16oversaturates16obliterations15obstinateness15ominousnesses15ongoingnesses15operationists15operosenesses15optionalities15oracularities15organogeneses15organogenesis15ornamentation15oscillational15osteoplasties15outgeneraling15outglittering15outintriguing15odorousnesses14orderlinesses14organisations14orienteerings14originalities14onerousnesses13orientational13