Opinionated rhymes with:
decaffeinated, decontaminated, denominated, emanated, exterminated, germinated, halogenated, hydrogenated, hyphenated, impersonated, indoctrinated, marinated, predominated, rejuvenated, renominated, resonated, subordinated
Opinionated sounds like:
obando, offend, offended, offhand, opened, opined, opinionate, opponent