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