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