Here's what rhymes with decongestive.
congestive festive restive suggestive digestive Words that almost rhyme with decongestive
testis objective attentive connective directive compressive convective pensive effective collective perspective aggressive impressive intensive subjective defective incentive affective corrective detective elective irrespective oppressive deceptive infective inventive obsessive perceptive possessive invective inattentive retentive unperceptive extensive excessive expensive offensive protective respective successive defensive expressive prospective selective depressive ineffective preventive receptive recessive repressive projective redemptive regressive preemptive suppressive disincentive unimpressive digressive deflective imperceptive overattentive unoffensive progressive reflective contraceptive reflexive inoffensive introspective coextensive nonobjective noneffective comprehensive inexpensive retrospective apprehensive hypertensive hypotensive intersubjective transgressive counteroffensive inexpressive overaggressive nonsuccessive retrogressive immunosuppressive proprioceptive antihypertensive