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