Here's what rhymes with expansum.
handsome ransom hansom transom Words that almost rhyme with expansum
chanson expansion damson mansion scansion tandem tantum bantam random maxim datum phantom spasm tantrum talcum pablum platinum stratum chasm fathom madam madame magnum plasm sachem gladsome sphagnum amalgam sanctum phantasm memorandum macadam nonrandom enthusiasm cytoplasm substratum neoplasm tarmacadam protoplasm iconoclasm