Here's what rhymes with arboretum.
teatime Words that almost rhyme with arboretum
beaten phaeton wheaten neaten didn region freedom deepen legion needn sweeten cheapen cretin unbeaten overeaten collegian steepen rerum diesem cerium chiefdom labium threesome fiefdom sheikdom sheikhdom museum hominum imperium capsicum cilium samarium coliseum mausoleum encomium trapezium solarium francium protactinium