13-Letter Words Starting With O
over 100 words
Browse all over 100 valid 13-letter Scrabble words that begin with the letter O. Each word shows its Scrabble point value — click any word to open it in WordScout.
objectionable26objectionably29objectiveness27objectivistic29objectivities27obliquenesses24obliterations15obliviousness18obnoxiousness22obnubilations17obscurantisms19obscurantists17obscurenesses17observability23observational18observatories18obsessionally18obsessiveness18obsolescences19obsolescently20obstetrically20obstetricians17obstinateness15obtainability20obtrusiveness18obviousnesses18occidentalize27oceanographer21oceanographic23oceanologists16ochlocratical22octodecillion18octogenarians16octosyllabics22octosyllables20odontoblastic18odontoglossum17odoriferously20odorousnesses14offensiveness22offhandedness24officeholders25officiousness21oleandomycins21oleomargarine16olfactometers20oligopolistic18ombudsmanship25ominousnesses15omnicompetent21omnipresences19oneiromancies17onerousnesses13ongoingnesses15onomastically20onomasticians17onomatologies16onomatologist16onomatopoeias17onomatopoetic19ontologically19onychophorans26openabilities17openheartedly22openmouthedly24operabilities17operationally18operationisms17operationists15operativeness18operosenesses15ophthalmology27opinionatedly19opisthobranch25opportuneness17opportunistic19opportunities17oppositionist17opprobriously22optimisations17optimizations26optionalities15oracularities15orchestraters18orchestrating19orchestration18orchestrators18orderlinesses14organisations14organizations23organogeneses15organogenesis15organogenetic17orgiastically19orientalizing23orientational13orienteerings14originalities14originatively20orismological18ornamentation15ornithischian21ornithologies17ornithologist17oropharyngeal22orthodontists17orthoepically23orthogonality20orthogonalize26orthographies22orthopterists18orthopteroids19oscillational15oscillographs21oscillography24oscilloscopes19oscilloscopic21ossifications18osteomalacias17osteomyelitis18osteoplasties15osteosarcomas17ototoxicities22outbargaining17outdelivering18outdistancing17outgeneraling15outglittering15outintriguing15outmaneuvered19outmanipulate17outorganizing24outperforming21outplacements19outpoliticked22outpopulating18outrebounding17outreproduced19outreproduces18outspokenness19outstandingly18outstretching19outtravelling17outwardnesses17ovariectomies20overabundance21overachievers24overachieving25overadvertise20overambitious20overamplified24overanalyzing29overanxieties23overarranging18overasserting17overassertion16overassertive19overattention16overbalancing21overbearingly22overbejeweled29overbleaching24overborrowing22overbreathing22overburdening20overcivilized31overcommitted23overconcerned21overconfident22overconscious20overconstruct20overconsuming21overcorrected21overcredulous19overdecorated20overdecorates19overdemanding21overdependent20overdesigning19overdeveloped23overdirecting20overdiscounts19overdiversity23overdocuments21overdominance21overdramatize28overeagerness17overeducating20overeducation19overelaborate18overembellish23overemotional18overemphasize32overencourage19overenergetic19overengineers17overestimated19overestimates18overexercised26overexercises25overexertions23overexpanding27overexpansion25overexplained26overexploited26overexposures25overextending25overextension23overexuberant25overfertilize28overfocussing22overfulfilled23overglamorize28overgoverning21overharvested23overidealized27overidealizes26overimpressed21overimpresses20overindulgent18overindulging19overinflating20overinflation19overinforming22overingenious17overingenuity20overinsistent16overintensity19overissuances18overlengthens20overlordships22overmastering19overmedicated22overmedicates21overnourished20overnourishes19overnutrition16overoperating19overoptimisms22overoptimists20overorganized27overorganizes26overornaments18overpackaging26overpedalling20overpersuaded20overpersuades19overpopulated21overpopulates20overprescribe22overpressures18overprocessed21overprocesses20overproducing22overprogramed22overpromising21overpromoting21overprotected21overqualified29overreactions18overregulated18overregulates17overreliances18overreporting19overresponded20oversaturated17oversaturates16oversecretion18oversensitive19overseriously19overservicing22overshadowing24overslaughing21overspeculate20overspreading20overstability21overstatement18overstimulate18overstraining17overstressing17overstretched22overstretches21oversubscribe22oversupplying24oversweetened20oversweetness19overtalkative23overtaxations23overtightened21overtreatment18overutilizing26overvaluation19overweeningly23overweighting24overwintering20overwithholds26ovipositional18ovoviviparous24oxaloacetates22oxyhemoglobin31oystercatcher23
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