Here's what rhymes with compositarum.
                        
                        
                    
                                harem  antiserum  Words that almost rhyme with compositarum
cerebellum  heron  vellum  velum  antebellum  melon  felon  flagellum  watermelon  denim  venom  addendum  plenum  bedlam  jetsam  phenom  seldom  spectrum  welcome  rectum  septum  plectrum  webcam  bubblegum  momentum  unwelcome  interregnum  referendum