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