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