Here's what rhymes with mantrum.
antrum tantrum Words that almost rhyme with mantrum
atom annum phantom anthem tantum bantam angstrom handsome random album maxim datum madam ransom tandem alum madame magnum hansom platinum amalgam chasm fathom sanctum sachem transom talcum pablum memorandum stratum spasm plasm macadam nonrandom gladsome sphagnum phantasm neoplasm enthusiasm substratum tarmacadam cytoplasm iconoclasm protoplasm