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