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