11-Letter Words Start with 'o'

There are 646 11-letter words that start with 'o'.

oarsmanship	obesenesses	obfuscating
obfuscation	obfuscatory	obituarists
objectified	objectifies	objectively
objectivism	objectivist	objectivity
objurgating	objurgation	objurgatory
obligations	obliqueness	obliquities
obliterated	obliterates	obliterator
obliviously	obnoxiously	obnubilated
obnubilates	obscenities	obscurantic
obscuration	obscureness	obscurities
obsecrating	observables	observances
observantly	observation	observatory
observingly	obsessional	obsessively
obsolescent	obsolescing	obstetrical
obstinacies	obstinately	obstructing
obstruction	obstructive	obstructors
obtainments	obtrusively	obtundities
obturations	obviousness	occasioning
occipitally	occultation	occupancies
occupations	occurrences	oceanariums
oceanfronts	ochlocratic	octagonally
octahedrons	octapeptide	odontoblast
odoriferous	odorousness	oecumenical
offenseless	offensively	offertories
offhandedly	officialdom	officialese
officialism	officiaries	officiating
officiation	officiously	oxidatively
oxygenating	oxygenation	oxygenators
oxygenizing	oxyhydrogen	ozonization
ozonosphere	offprinting	offscouring
olfactories	oligarchies	oligochaete
oligoclases	oligopolies	ominousness
omnifarious	omnipotence	omnipotents
omnipresent	omniscience	oncogeneses
oncogenesis	oncological	oncologists
oncoviruses	oneirically	oneiromancy
onerousness	ongoingness	onomatology
ontogeneses	ontogenesis	ontogenetic
ontological	ontologists	opalescence
openability	openhearted	openmouthed
operability	operagoings	operational
operatively	operculated	operettists
operoseness	ophiologies	ophthalmias
opinionated	opponencies	opportunely
opportunism	opportunist	opportunity
oppositions	oppressions	opprobrious
opprobriums	opsonifying	optionality
optokinetic	optometries	optometrist
oracularity	orangewoods	orbicularly
orchardists	orchestrate	ordainments
orderliness	ordinariest	ordinations
ordonnances	organically	organicisms
organicists	organizable	orientalism
orientalist	orientalize	orientating
orientation	originality	originating
origination	originative	originators
ornamentals	ornamenting	ornithology
ornithopods	ornithopter	orographies
orphanhoods	orthocenter	orthoclases
orthodontia	orthodontic	orthodoxies
orthoepists	orthography	orthonormal
orthopaedic	orthopedics	orthopedist
orthopteran	orthoscopic	orthostatic
oscillating	oscillation	oscillators
oscillatory	oscillogram	oscitancies
osculations	osmiridiums	osmometries
osmotically	ostensively
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Note: These 646 11-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)