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