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