Here's what rhymes with penetratum.
stratum datum substratum Words that almost rhyme with penetratum
latin platen madam satin madame fatten flatten batten happen hadn cabin haben gladden macadam sadden madden imagine tarmacadam platinum plasm random chasm fathom phantom ransom neoplasm tantum sachem transom bantam handsome maxim spasm tandem magnum sanctum tantrum hansom nonrandom gladsome talcum pablum cytoplasm amalgam phantasm sphagnum memorandum protoplasm iconoclasm enthusiasm