Here's what rhymes with functive.
subjunctive disjunctive Words that almost rhyme with functive
seductive irruptive inductive eruptive vocative assumptive destructive productive instructive disruptive obstructive conductive ablative locative fricative appositive lenitive constructive impulsive repulsive transitive convulsive presumptive consumptive mutative combustive reproductive compulsive unproductive propulsive proliferative reconstructive nondestructive nonproductive superconductive nonconstructive counterproductive