11 Letter Adjectives Starting with O

This list gathers 115 English 11 letter adjectives that start with O, such as Outstanding, Operational, Overarching, Opinionated, Overcrowded, Overpowered and Opportunist. Use the sorting controls below to organize entries by length, or consult our adjective grammar guide to check adjective order and comparative rules.

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Starts with OB16 words
obstructive
obstetrical
objectivist
obsessional
obsolescent
obfuscatory
objectional
objurgatory
observative
objurgative
obediential
obscurantic
obmutescent
obsidionary
obsignatory
obliquitous
Starts with OC8 words
octuplicate
ochlocratic
octillionth
ochlophobic
octachordal
octonocular
octanedioic
octingenary
Starts with OD3 words
odoriferous
odontogenic
odontologic
Starts with OF
1 words
offenseless
Starts with OL4 words
oligochaete
oleographic
oligomerous
oligochrome
Starts with OM4 words
omnipresent
omnifarious
ombrogenous
omnipatient
Starts with ON4 words
ontological
oncological
ontogenetic
onagraceous
Starts with OO
1 words
oom-pah-pah
Starts with OP8 words
operational
opinionated
opportunist
openhearted
openmouthed
opprobrious
optokinetic
operculated
Starts with OR17 words
orthodontic
originalist
orientalist
orthonormal
orthostatic
orbicularis
organizable
originative
orthopteran
orthotropic
orthodromic
orthoscopic
orbiculated
orthonectid
orthoepical
orthophyric
oreological
Starts with OS10 words
osteopathic
oscillatory
osteophytic
oscillative
ostrichlike
osteogenous
osteodermal
osteodermic
ostreaceous
ostracodous
Starts with OU4 words
outstanding
outswinging
outcrossing
outdwelling
Starts with OV24 words
overarching
overcrowded
overpowered
overbearing
overexposed
overzealous
overwrought
overdressed
overexcited
overstuffed
overweening
overanxious
overcomplex
overserious
overrefined
overcareful
overliteral
overmuscled
overcurious
overprecise
overviolent
overobvious
overfraught
overintense
Starts with OX5 words
oxyhydrogen
oxaloacetic
oxidational
oxycephalic
oxidimetric
Starts with OZ
1 words
ozoniferous

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