adjective
unlike, conflicting; completely different
Synonyms: adverse, antagonistic, antipodal, antipodean, antithetical, contradictory, contrapositive, contrary, contrasted, corresponding, counter, crosswise, diametric, diametrically opposed, different, differing, dissimilar, diverse, facing, flip-side, fronting, hostile, inconsistent, independent, inimical, inverse, irreconcilable, obverse, opposed, ornery, paradoxical, polar, repugnant, retrograde, reverse, reversed, separate, unalike, unconnected, unrelated, unsimilar, violative, vis-á-vis
Antonyms: compatible, like, similar
noun
something completely unlike
Synonyms: another adverse, antilogy, antipode, antipole, antithesis, antonym, contra, contradiction, contrary, contrast, converse, counterpart, foil, inverse, obverse, opposition, other extreme, other side, other side of coin, paradox, reverse, vice versa
Antonyms: likeness, same, similarity