13-letter words starting with O
797 words — Scrabble scores shown
There are 797 13-letter words that start with the letter O in our word list. All words are valid in standard English dictionaries and can be used in Scrabble and Words with Friends. The number shown on each word is its Scrabble point value.
2-letter
(19)
3-letter
(91)
4-letter
(201)
5-letter
(334)
6-letter
(705)
7-letter
(1196)
8-letter
(1744)
9-letter
(1892)
10-letter
(1726)
11-letter
(1373)
12-letter
(1021)
13-letter
(797)
14-letter
(598)
15-letter
(403)
- obedientially19
- objectionable26
- objectionably29
- objectivating28
- objectivation27
- objectiveness27
- objectivistic29
- objectivizing37
- objectization33
- objurgatively29
- objurgatorily26
- obligationary19
- obliquangular25
- obliterations15
- obliviousness18
- obnoxiousness22
- obscurantists17
- observability23
- observantness18
- observational18
- observatorial18
- observatories18
- obsessionally18
- obsessiveness18
- obsolescently20
- obstetrically20
- obstetricated18
- obstetricians17
- obstinateness15
- obstructingly21
- obstructively23
- obstructivism22
- obstructivity23
- obtainability20
- obtenebration17
- obtrusiveness18
- obtusifolious18
- obtusilingual16
- obtusipennate17
- occasionalism19
- occasionalist17
- occasionality20
- occidentalism20
- occidentalist18
- occidentality21
- occidentalize27
- occipitoaxial26
- occipitoaxoid27
- occipitohyoid26
- occipitoiliac21
- occipitonasal19
- occlusiveness20
- oceanographer21
- oceanographic23
- oceanological18
- oceanologists16
- ochlocratical22
- octanaphthene23
- octarticulate17
- octobrachiate22
- octocentenary20
- octocoralline17
- octodactylous21
- octodecillion18
- octogenarians16
- octuplication19
- oculocephalic24
- odontatrophia19
- odontoblastic18
- odontogenesis15
- odontoglossae15
- odontoglossal15
- odontoglossum17
- odontognathae18
- odontognathic20
- odontographic22
- odontological17
- odontophorine19
- odontophorous19
- odontornithes17
- odontornithic19
- odontorrhagia18
- odontorthosis17
- odontostomous16
- odontotherapy22
- odontotripsis16
- odoriferosity20
- odoriferously20
- oedogoniaceae17
- oenotheraceae18
- oesophagismus21
- offencelessly24
- offenselessly22
- offensiveness22
- offhandedness24
- officeholders25
- officialities21
- officializing31
- officiousness21
- oleomargarine16
- oleosaccharum22
- olericultural15
- olethreutidae17
- olfactometric22
- olfactophobia25
- oligacanthous19
- oligochaetous19
- oligocythemia24
- oligocythemic26
- oligodactylia20
- oligogalactia17
- oligometochia21
- oligometochic23
- oligonephrous19
- oligopetalous16
- oligophyllous22
- oligopolistic18
- oligoprothesy22
- oligosepalous16
- oligosiderite15
- oligospermous18
- oligosyllabic21
- oligosyllable19
- ombudsmanship25
- omentorrhaphy26
- ommatophorous22
- omniactuality20
- omnicausality20
- omnicompetent21
- omnicorporeal19
- omnicredulity21
- omnicredulous18
- omnifariously21
- omninescience19
- omnipresently20
- omniprevalent20
- omnirevealing19
- omniscriptive22
- omnisentience17
- omnivoracious20
- omoplatoscopy24
- omphalogenous21
- omphalotripsy25
- onchocercosis22
- oneirocritics17
- oneiroscopist17
- onomatologist16
- onomatophobia22
- onomatopoeial17
- onomatopoeian17
- onomatopoesis17
- onomatopoetic19
- ontogenetical16
- ontogenically19
- ontologically19
- onychatrophia26
- onychomalacia25
- onychomycosis28
- onychophagist27
- onychophorous26
- onychorrhexis31
- onychoschizia35
- oosporiferous18
- opacification22
- openendedness17
- openheartedly22
- openmouthedly24
- operabilities17
- operationally18
- operativeness18
- ophicephaloid26
- ophichthyidae30
- ophidiophobia26
- ophiomorphous25
- ophiostaphyle26
- ophthalaiater21
- ophthalmalgia24
- ophthalmalgic26
- ophthalmiater23
- ophthalmocele25
- ophthalmolith26
- ophthalmology27
- ophthalmostat23
- ophthalmotomy28
- opiniatreness15
- opinionatedly19
- opinionedness16
- opisthobranch25
- opisthocoelia20
- opisthocomine22
- opisthocomous22
- opisthoglossa19
- opisthoglypha27
- opisthography27
- opisthogyrate22
- opisthogyrous22
- opisthoparian20
- opisthophagic26
- opisthoporeia20
- opisthothelae21