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