Open English Wordnet
Adjectives
(s)contrastive, incompatibleof words so related that one contrasts with the other“`rich' and `hard-up' are contrastive terms”
(s)contrasting, contrastivestrikingly different; tending to contrast“contrasting (or contrastive) colors”
(s)contrastivesyntactically establishing a relation of contrast between sentences or elements of a sentence“disjunctive conjunctions like `but', `or', or `though' serve a contrastive function”