Aren't rhymes with:
arant, arent, farrant, garant, parrent, tarrant, aberrant, abhorrent, adherent, apparent, arant, arent, arrant, berent, bondurant, burandt, celebrant, coherent, courant, declarant, deterrent, durant, durrant, emerant, emigrant, entrant, errant, farrant, ferrant, flagrant, fragrant, garant, garrabrant, grandparent, guerrant, hildebrandt, hildebrant, hilderbrandt, homefront, hydrant, immigrant, incoherent, indifferent, inherent, laurent, migrant, milbrandt, morant, parent, parrent, quadrant, recalcitrant, registrant, sarant, seafront, st_laurent, tarrant, torrent, transparent, tyrant, vagrant, vibrant, warrant
Aren't sounds like:
ahranat, ahrendt, aramid, araminta, aranda, arant, arend, arendt, arent, armada, armament, armand, armando, armandt, armato, armed, arment, armenta, armetta, armida, armond, armwood, arnatt, arnaud, arndt, arnett, arnette, arnot, arnott, around, arrant, aurand