12 letter adjectives that start with O
We have listed 71 12-letter adjectives that start with O for you in this WordMom word list. All these 12-letter adjectives starting with O were verified by specialists in the English language.
- obstreperous
- oblanceolate
- obligational
- obcompressed
- obliterative
- obreptitious
- obtusangular
- occupational
- octogenarian
- octosyllabic
- octosyllable
- octopetalous
- ochroleucous
- octostichous
- octoradiated
- octospermous
- occasionable
- oenanthylous
- oligarchical
- omnispective
- onomatopoeic
- oneirocritic
- onagrarieous
- opinionative
- ophiological
- ophiophagous
- opiniastrous
- operculiform
- orthographic
- orchestrated
- orthopedical
- orthotropous
- organicistic
- orthomorphic
- orographical
- orthopterous
- orthorhombic
- orthosilicic
- orchidaceous
- organoleptic
- orthoclastic
- ornithologic
- orichalceous
- orthognathic
- orthodoxical
- ostentatious
- osteogenetic
- osteological
- osteoplastic
- otherworldly
- outstretched
- overreaching
- overwhelming
- overcautious
- overpowering
- overburdened
- overgenerous
- overcritical
- overabundant
- overdelicate
- overfamiliar
- overturnable
- overmalapert
- overfrequent
- overfruitful
- overrigorous
- overnumerous
- overtroubled
- overluscious
- overstudious
- oxygenizable