Adjectives That Start with O and End with US

Explore 133 verified English adjectives starting with O and ending with US, including Obvious, Outrageous, Ominous, Oblivious, Obnoxious, Onerous and Omnibus. Sort these describing words and descriptive modifiers by word length for character descriptions, creative writing, and compliment lists below, or check adjective order and comparative rules in our adjective grammar guide.

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Starts with OB8 words
obvious
oblivious
obnoxious
obsequious
obstreperous
obreptitious
obliquitous
obdiplostemonous
Starts with OC12 words
ochreous
ocherous
ochraceous
ochroleucous
octopodous
octosepalous
octandrous
octamerous
octostichous
octastichous
octopetalous
octogynous
Starts with OD7 words
odious
odorous
odoriferous
odontomatous
odontorhynchous
odontophorous
odontostomatous
Starts with OF
1 words
officious
Starts with OL8 words
oleaginous
olivaceous
oligophagous
oleaceous
oleraceous
oleoresinous
oleiferous
oligomerous
Starts with OM12 words
ominous
omnibus
omnivorous
omnifarious
ombrogenous
ombrophobous
omniferous
ombrophilous
omnigenous
omniparous
omophagous
ommatophorous
Starts with ON5 words
onerous
onymous
onkus
oncogenous
onagraceous
Starts with OO
2 words
oogamous
oosporous
Starts with OP11 words
opprobrious
ophiomorphous
ophiophagous
opacous
opisthocoelous
opisthognathous
ophiolatrous
ophthalmophorous
oppositipetalous
ophioglossaceous
oppositisepalous
Starts with OR18 words
organophosphorus
orgulous
oraculous
orchidaceous
ornithophilous
orchideous
orthopterous
ordurous
orthognathous
orthotropous
orichalceous
ornithodelphous
orthostichous
orthocephalous
orobanchaceous
oragious
ornithorhynchous
ornithocephalous
Starts with OS18 words
ostentatious
osseous
osseocartilaginous
ossivorous
osteocartilaginous
osteogenous
ossiferous
osteosarcomatous
osmious
osteochondromatous
osmous
ostraceous
ostreaceous
osteodermous
osteodermatous
ostreophagous
ostracodous
oscillatoriaceous
Starts with OU
1 words
outrageous
Starts with OV24 words
overzealous
overcautious
overambitious
overanxious
overserious
overgenerous
oversolicitous
oviparous
ovoviviparous
overscrupulous
overconscious
overcurious
oversuspicious
overfastidious
overconscientious
overobvious
ovigerous
overcredulous
overingenious
overpresumptuous
overtedious
ovuliferous
oviferous
oversuperstitious
Starts with OX
2 words
oxygenous
oxycephalous
Starts with OZ
2 words
ozonous
ozoniferous

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