14-Letter Words Start with 'o'

There are 213 14-letter words that start with 'o'.

obduratenesses	objectlessness
obligingnesses	obsequiousness
obsoletenesses	obstreperously
obstructionism	obstructionist
occidentalized	occidentalizes
occupationally	oceanographers
oceanographies	octodecillions
odontoglossums	oxidoreductase
oxyhemoglobins	oxymoronically
oystercatchers	oleaginousness
oleomargarines	oligopsonistic
ombudsmanships	omnicompetence
omphaloskepses	omphaloskepsis
onchocerciases	onchocerciasis
oncogenicities	oncornaviruses
onomatologists	oophorectomies
openhandedness	operationalism
operationalist	ophthalmologic
ophthalmoscope	ophthalmoscopy
opinionatively	opisthobranchs
opposabilities	oppositenesses
oppositionists	oppressiveness
optimistically	optoelectronic
orchestrations	ordinarinesses
organismically	organizational
organochlorine	organometallic
ornamentations	ornithischians
ornithological	ornithologists
orthochromatic	orthogonalized
orthogonalizes	orthographical
orthomolecular	orthopedically
orthophosphate	oscillographic
osmoregulation	osmoregulatory
ostentatiously	osteoarthritic
osteoarthritis	osteosarcomata
otolaryngology	outdatednesses
outgoingnesses	outlandishness
outmaneuvering	outmanipulated
outmanipulates	outpoliticking
outrageousness	outreproducing
outsidernesses	ovariectomized
overabundances	overaccentuate
overactivities	overadjustment
overadvertised	overadvertises
overaggressive	overanalytical
overarticulate	overassertions
overassessment	overattentions
overbreathings	overcapacities
overcapitalize	overcentralize
overclassified	overclassifies
overcommitment	overcommitting
overcompensate	overcompliance
overcomplicate	overcompressed
overcompresses	overconcerning
overconfidence	overconstructs
overcontrolled	overcorrecting
overdecorating	overdecoration
overdependence	overdetermined
overdeveloping	overdiscounted
overdocumented	overdominances
overdramatized	overdramatizes
overeducations	overelaborated
overelaborates	overemphasized
overemphasizes	overencouraged
overencourages	overengineered
overenthusiasm	overestimating
overestimation	overevaluation
overexaggerate	overexercising
overexpansions	overexplaining
overexploiting	overextensions
overextraction	overfastidious
overfertilized	overfertilizes
overfulfilling	overgeneralize
overgenerosity	overgenerously
overglamorized	overglamorizes
overharvesting	overhomogenize
overidealizing	overidentified
overidentifies	overimpressing
overindulgence	overinflations
overinvestment	overlengthened
overmaturities	overmedicating
overmedication	overnourishing
overnutritions	overoptimistic
overorganizing	overornamented
overparticular	overpersuading
overpersuasion	overpopulating
overpopulation	overpoweringly
overprescribed	overprescribes
overprivileged	overprocessing
overproduction	overprograming
overprogrammed	overproportion
overprotecting	overprotection
overprotective	overrefinement
overregulating	overregulation
overresponding	oversaturating
oversaturation	overscrupulous
oversecretions	oversimplified
oversimplifies	oversimplistic
oversolicitous	overspecialize
overspeculated	overspeculates
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Note: These 213 14-letter words that start with 'o' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with ov, ou, or, ob, op, os, oc, ox, ol, on, of, om, od, oo, ot, oi, oa, oe, og, oz, ow, oy, ok, oh, oq.

2-letter words start with 'o' (13)
3-letter words start with 'o' (48)
4-letter words start with 'o' (112)
5-letter words start with 'o' (185)
6-letter words start with 'o' (341)
7-letter words start with 'o' (645)
8-letter words start with 'o' (1,012)
9-letter words start with 'o' (1,065)
10-letter words start with 'o' (880)
11-letter words start with 'o' (646)
12-letter words start with 'o' (439)
13-letter words start with 'o' (301)
14-letter words start with 'o' (213)
15-letter words start with 'o' (157)