Here's what rhymes with nonsubstantive.
Words that almost rhyme with nonsubstantive
punches lunches plunges hunches lunges brunches munches crunches lumpish expunges frumpish scrunches keypunches muskellunges obstructive seductive irruptive destructive productive inductive disruptive subjunctive ablative disjunctive eruptive vocative appositive constructive instructive impulsive repulsive unproductive conductive locative fricative nondestructive propulsive assumptive mutative combustive lenitive nonconstructive reproductive compulsive transitive convulsive presumptive consumptive nonproductive counterproductive proliferative reconstructive superconductive