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