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