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