contrastive

Adjective (3)

1. of words so related that one contrasts with the other“`rich' and `hard-up' are contrastive terms”Synonyms: incompatible
2. strikingly different; tending to contrast“contrasting (or contrastive) colors”Synonyms: contrasting
3. syntactically establishing a relation of contrast between sentences or elements of a sentence“disjunctive conjunctions like `but', `or', or `though' serve a contrastive function”