14-letter words starting with O
Embark on a linguistic journey with words that begin with the letter O. This section showcases how O at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with O, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| overprotective | 24 | overly protective | overprotective parents |
| overwhelmingly | 29 | incapable of being resisted | the candy looked overwhelmingly desirable to the dieting man |
| overpopulation | 21 | too much population | - |
| organizational | 24 | of or relating to an organization | organizational structure |
| overconfidence | 25 | total certainty or greater certainty than circumstances warrant | - |
| optimistically | 23 | with optimism; in an optimistic manner | `We have a good chance of winning,' he exclaimed optimistically |
| osteoarthritis | 17 | chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age | - |
| orthomolecular | 21 | designating or relating to a form of treatment of mental disorders that seeks to restore biochemical balance in the body with large doses of vitamins and minerals | orthomolecular medicine |
| outrageousness | 15 | the quality of being outrageous | - |
| overcompensate | 23 | make excessive corrections for fear of making an error | - |
| overestimating | 20 | - | - |
| oversubscribed | 24 | sold in excess of available supply especially season tickets | the opera season was oversubscribed |
| obsequiousness | 25 | abject or cringing submissiveness | - |
| organisational | 15 | of or relating to an organization | - |
| overemphasized | 34 | - | - |
| overestimation | 19 | a calculation that results in an estimate that is too high | - |
| overproduction | 22 | too much production or more than expected | - |
| overstimulated | 20 | - | - |
| obstructionist | 18 | someone who systematically obstructs some action that others want to take | - |
| overdramatized | 30 | - | - |
| overindulgence | 21 | excessive indulgence | the child was spoiled by overindulgence |
| obduratenesses | 17 | - | - |
| obedientiaries | 17 | - | - |
| objectivations | 28 | - | - |
| objectlessness | 25 | - | - |
| obligatoriness | 17 | - | - |
| obligingnesses | 18 | - | - |
| observableness | 21 | - | - |
| obsoletenesses | 16 | - | - |
| obstreperating | 19 | - | - |
| obstreperously | 21 | in manner that attracts attention | obstreperously, he demanded to get service |
| obstructionism | 20 | deliberate interference | - |
| occasionalisms | 20 | - | - |
| occasionalists | 18 | - | - |
| occidentalised | 20 | - | - |
| occidentalises | 19 | - | - |
| occidentalisms | 21 | - | - |
| occidentalists | 19 | - | - |
| occidentalized | 29 | - | - |
| occidentalizes | 28 | - | - |
| occupationally | 23 | - | - |
| oceanographers | 22 | - | - |
| oceanographies | 22 | - | - |
| octingentenary | 20 | - | - |
| octodecillions | 19 | - | - |
| odonatologists | 16 | - | - |
| odontoglossums | 18 | - | - |
| odontographies | 21 | - | - |
| oesophagitises | 20 | - | - |
| oesophagoscope | 24 | an optical instrument for examining the inside of the esophagus | - |
| oesophagoscopy | 27 | - | - |
| olallieberries | 16 | - | - |
| oleaginousness | 15 | consisting of or covered with oil | - |
| oleomargarines | 17 | - | - |
| olfactologists | 20 | - | - |
| olfactometries | 21 | - | - |
| oligarchically | 25 | - | - |
| oligocythaemia | 25 | - | - |
| oligopsonistic | 19 | - | - |
| ombudsmanships | 26 | - | - |
| omissivenesses | 19 | - | - |
| omnibenevolent | 21 | - | - |
| omnicompetence | 24 | - | - |
| omnivorousness | 19 | - | - |
| omphalomancies | 25 | - | - |
| omphaloskepses | 27 | - | - |
| omphaloskepsis | 27 | literally, the contemplation of one's navel, which is an idiom usually meaning complacent self-absorption | - |
| onchocerciases | 23 | - | - |
| onchocerciasis | 23 | infestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleas; when the eyes are involved it can result in blindness; common in Africa and tropical America | - |
| oncogeneticist | 19 | - | - |
| oncogenicities | 19 | - | - |
| oncornaviruses | 19 | - | - |
| oneirocritical | 18 | - | - |
| oneiroscopists | 18 | - | - |
| onomasiologies | 17 | - | - |
| onomatologists | 17 | - | - |
| onomatopoieses | 18 | - | - |
| onomatopoiesis | 18 | - | - |
| onychophagists | 28 | - | - |
| oophorectomies | 23 | - | - |
| oophorectomise | 23 | - | - |
| oophorectomize | 32 | - | - |
| openhandedness | 21 | liberality in bestowing gifts; extremely liberal and generous of spirit | - |
| operationalism | 18 | (philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it | - |
| operationalist | 16 | of or relating to or espousing operationalism | operationalist doctrine |
| ophthalmitises | 24 | - | - |
| ophthalmologic | 27 | - | - |
| ophthalmometer | 26 | - | - |
| ophthalmometry | 29 | - | - |
| ophthalmoscope | 28 | medical instrument for examining the retina of the eye | - |
| ophthalmoscopy | 31 | examination of the interior of an eye using an ophthalmoscope | - |
| opinionatively | 22 | - | - |
| opisthobranchs | 26 | - | - |
| opisthocoelian | 21 | - | - |
| opisthocoelous | 21 | - | - |
| opisthoglossal | 20 | - | - |
| opisthographic | 27 | - | - |
| opisthotonoses | 19 | - | - |
| oppignerations | 19 | - | - |
| oppignorations | 19 | - | - |
| opposabilities | 20 | - | - |
| oppositenesses | 18 | - | - |
| oppositionists | 18 | - | - |
| oppositionless | 18 | - | - |
| oppressiveness | 21 | a feeling of being oppressed | - |
| opsonification | 21 | - | - |
| optimalisation | 18 | - | - |
| optimalization | 27 | - | - |
| optoelectronic | 20 | - | - |
| oracularnesses | 16 | - | - |
| orbicularities | 18 | - | - |
| orchardgrasses | 21 | - | - |
| orchestralists | 19 | - | - |
| orchestrations | 19 | - | - |
| orchidectomies | 24 | - | - |
| orchidologists | 21 | - | - |
| orchidomaniacs | 24 | - | - |
| ordinarinesses | 15 | - | - |
| organisability | 20 | - | - |
| organismically | 22 | - | - |
| organizability | 29 | - | - |
| organochlorine | 20 | - | - |
| organographies | 21 | - | - |
| organographist | 21 | - | - |
| organometallic | 19 | - | - |
| ornamentations | 16 | - | - |
| ornithichnites | 22 | - | - |
| ornithischians | 22 | - | - |
| ornithodelphic | 25 | - | - |
| ornithological | 20 | of or relating to ornithology | her ornithological interests |
| ornithologists | 18 | - | - |
| ornithomancies | 21 | - | - |
| ornithomorphic | 26 | - | - |
| ornithophilies | 22 | - | - |
| ornithophilous | 22 | - | - |
| ornithophobias | 24 | - | - |
| ornithoscopies | 21 | - | - |
| orobanchaceous | 23 | - | - |
| orogenetically | 20 | - | - |
| orographically | 25 | - | - |
| ororotundities | 15 | - | - |
| orthocephalies | 24 | - | - |
| orthocephalous | 24 | - | - |
| orthochromatic | 26 | - | - |
| orthodiagonals | 19 | - | - |
| orthogenically | 23 | - | - |
| orthognathisms | 23 | - | - |
| orthogonalised | 19 | - | - |
| orthogonalises | 18 | - | - |
| orthogonalized | 28 | - | - |
| orthogonalizes | 27 | - | - |
| orthographical | 25 | - | - |
| orthographists | 23 | - | - |
| orthohydrogens | 25 | - | - |
| orthomyxovirus | 32 | a group of viruses including those causing influenza | - |
| orthopedically | 25 | - | - |
| orthophosphate | 27 | a salt of phosphoric acid | - |
| orthopinakoids | 24 | - | - |
| orthopterology | 23 | - | - |
| orthopyroxenes | 29 | - | - |
| orthosilicates | 19 | - | - |
| oscillographic | 24 | - | - |
| osmometrically | 23 | - | - |
| osmoregulation | 17 | - | - |
| osmoregulatory | 20 | - | - |
| ostentatiously | 17 | with ostentation; in an ostentatious manner | Mr Khrushchev ostentatiously wooed and embraced Castro at the U.N. general assembly |
| osteoarthritic | 19 | - | - |
| osteoarthroses | 17 | - | - |
| osteoarthrosis | 17 | - | - |
| osteodermatous | 17 | - | - |
| osteologically | 20 | - | - |
| osteosarcomata | 18 | - | - |
| ostreicultures | 16 | - | - |
| otherworldlier | 21 | - | - |
| otolaryngology | 22 | the medical specialty that deals with diseases of the ear, nose and throat | - |
| outdatednesses | 16 | - | - |
| outfangthieves | 24 | - | - |
| outgeneralling | 16 | - | - |
| outgoingnesses | 16 | - | - |
| outlandishness | 18 | strikingly out of the ordinary | - |
| outmaneuvering | 20 | - | - |
| outmanipulated | 19 | - | - |
| outmanipulates | 18 | - | - |
| outmanoeuvring | 20 | - | - |
| outmodednesses | 18 | - | - |
| outpoliticking | 23 | - | - |
| outrecuidances | 19 | - | - |
| outreproducing | 20 | - | - |
| outsettlements | 16 | - | - |
| outsidernesses | 15 | - | - |
| ovariectomised | 22 | - | - |
| ovariectomized | 31 | - | - |
| overabstracted | 22 | - | - |
| overabundances | 22 | - | - |
| overabundantly | 23 | - | - |
| overaccentuate | 21 | - | - |
| overactivities | 22 | - | - |
| overadjustment | 27 | - | - |
| overadvertised | 22 | - | - |
| overadvertises | 21 | - | - |
| overadvertized | 31 | - | - |
| overadvertizes | 30 | - | - |
| overaggressive | 22 | - | - |
| overanalytical | 22 | - | - |
| overarticulate | 19 | - | - |
| overassertions | 17 | - | - |
| overassessment | 19 | - | - |
| overattentions | 17 | - | - |
| overbejewelled | 30 | - | - |
| overbreathings | 23 | - | - |
| overburdensome | 22 | - | - |
| overburthening | 23 | - | - |
| overcapacities | 23 | - | - |
| overcapitalise | 21 | estimate the capital value of (a company) at an unreasonably or unlawfully high level | - |
| overcapitalize | 30 | estimate the capital value of (a company) at an unreasonably or unlawfully high level | - |
| overcautioning | 20 | - | - |
| overcautiously | 22 | - | - |
| overcentralise | 19 | - | - |
| overcentralize | 28 | - | - |
| overclassified | 23 | - | - |
| overclassifies | 22 | - | - |
| overcommitment | 25 | - | - |
| overcommitting | 24 | - | - |
| overcompliance | 25 | - | - |
| overcomplicate | 25 | - | - |
| overcompressed | 24 | - | - |
| overcompresses | 23 | - | - |
| overconcerning | 22 | - | - |
| overconstructs | 21 | - | - |
| overcontrolled | 20 | - | - |
| overcorrecting | 22 | - | - |
| overcorrection | 21 | - | - |
| overdecorating | 21 | - | - |
| overdecoration | 20 | - | - |
| overdependence | 23 | - | - |
| overdetermined | 21 | - | - |
| overdeveloping | 24 | - | - |
| overdiagnosing | 20 | - | - |
| overdiscounted | 21 | - | - |
| overdocumented | 23 | - | - |
| overdominances | 22 | - | - |
| overdramatised | 21 | - | - |
| overdramatises | 20 | - | - |
| overdramatizes | 29 | - | - |
| overeducations | 20 | - | - |
| overelaborated | 20 | - | - |
| overelaborates | 19 | - | - |
| overemphasised | 25 | - | - |
| overemphasises | 24 | - | - |
| overemphasizes | 33 | - | - |
| overemployment | 26 | - | - |
| overencouraged | 21 | - | - |
| overencourages | 20 | - | - |
| overengineered | 19 | - | - |
| overenthusiasm | 22 | - | - |
| overevaluating | 21 | - | - |
| overevaluation | 20 | - | - |
| overexaggerate | 26 | - | - |
| overexcitement | 28 | - | - |
| overexercising | 27 | - | - |
| overexpansions | 26 | - | - |
| overexplaining | 27 | - | - |
| overexploiting | 27 | - | - |
| overextensions | 24 | - | - |
| overextraction | 26 | - | - |
| overfastidious | 21 | - | - |
| overfertilised | 21 | - | - |
| overfertilises | 20 | - | - |
| overfertilized | 30 | - | - |
| overfertilizes | 29 | - | - |
| overfinenesses | 20 | - | - |
| overflourished | 24 | - | - |
| overflourishes | 23 | - | - |
| overfondnesses | 21 | - | - |
| overfreighting | 25 | - | - |
| overfulfilling | 24 | - | - |
| overfullnesses | 20 | - | - |
| overgeneralise | 18 | draw too general a conclusion | - |
| overgeneralize | 27 | draw too general a conclusion | It is dangerous to overgeneralize |
| overgenerosity | 21 | - | - |
| overgenerously | 21 | - | - |
| overglamorised | 21 | - | - |
| overglamorises | 20 | - | - |
| overglamorized | 30 | - | - |
| overglamorizes | 29 | - | - |
| overglamourize | 29 | - | - |
| overharvesting | 24 | - | - |
| overhomogenise | 23 | - | - |
| overhomogenize | 32 | - | - |
| overidealising | 19 | - | - |
| overidealistic | 20 | - | - |
| overidealizing | 28 | - | - |
| overidentified | 22 | - | - |
| overidentifies | 21 | - | - |
| overimpressing | 22 | - | - |
| overinflations | 20 | - | - |
| overinsurances | 19 | - | - |
| overinterprets | 19 | - | - |
| overinvestment | 22 | - | - |
| overkindnesses | 22 | - | - |
| overlengthened | 22 | - | - |
| overmanagement | 22 | - | - |
| overmaturities | 19 | - | - |
| overmedicating | 23 | - | - |
| overmedication | 22 | - | - |
| overmultiplied | 22 | - | - |
| overmultiplies | 21 | - | - |
| overmultituded | 21 | - | - |
| overmultitudes | 20 | - | - |
| overnicenesses | 19 | - | - |
| overnourishing | 21 | - | - |
| overnutritions | 17 | - | - |
| overoptimistic | 23 | - | - |
| overorganising | 19 | - | - |
| overorganizing | 28 | - | - |
| overornamented | 20 | - | - |
| overparticular | 21 | - | - |
| overpedallings | 21 | - | - |
| overpersuading | 21 | - | - |
| overpersuasion | 19 | - | - |
| overpopulating | 22 | - | - |
| overpoweringly | 26 | incapable of being resisted | - |
| overpredicting | 23 | - | - |
| overprediction | 22 | - | - |
| overprescribed | 24 | - | - |
| overprescribes | 23 | - | - |
| overpressuring | 20 | - | - |
| overprivileged | 24 | - | - |
| overprocessing | 22 | - | - |
| overprograming | 23 | - | - |
| overprogrammed | 25 | - | - |
| overproportion | 21 | - | - |
| overprotecting | 22 | - | - |
| overprotection | 21 | excessive protection | - |
| overrashnesses | 20 | - | - |
| overrefinement | 22 | the act of distorting something so it seems to mean something it was not intended to mean | - |
| overregulating | 19 | - | - |
| overregulation | 18 | - | - |
| overresponding | 21 | - | - |
| overripenesses | 19 | - | - |
| oversaturating | 18 | - | - |
| oversaturation | 17 | - | - |
| overscheduling | 24 | - | - |
| overscrupulous | 21 | - | - |
| oversecretions | 19 | - | - |
| oversimplified | 25 | - | - |
| oversimplifies | 24 | - | - |
| oversimplistic | 23 | - | - |
| oversolicitous | 19 | excessively solicitous | - |
| overspecialise | 21 | become overly specialized | - |
| overspecialize | 30 | become overly specialized | She overspecialized when she concentrated on verbs in Fijian |
| overspeculated | 22 | - | - |
| overspeculates | 21 | - | - |
| overstatements | 19 | - | - |
| overstimulates | 19 | - | - |
| overstretching | 23 | - | - |
| overstructured | 20 | - | - |
| overstructures | 19 | - | - |
| oversubscribes | 23 | - | - |
| oversubtleties | 19 | - | - |
| oversuspicious | 21 | unduly suspicious | - |
| oversweetening | 21 | - | - |
| overtightening | 22 | - | - |
| overtreatments | 19 | - | - |
| overvaluations | 20 | - | - |
| overweathering | 24 | - | - |
| oxidoreductase | 25 | an enzyme that catalyzes oxidation-reduction | - |
| oxyhaemoglobin | 32 | the bright red hemoglobin that is a combination of hemoglobin and oxygen from the lungs | - |
| oxyhemoglobins | 32 | - | - |
| oxymoronically | 31 | - | - |
| oystercatchers | 24 | - | - |
