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