Here's what rhymes with methylhydantoin.
                        
                        
                    
                                Words that almost rhyme with methylhydantoin
widen  siren  beiden  hyphen  scion  siphon  hymen  syphon  horizon  lion  fibrin  bison  fireman  firemen  heighten  lichen  liken  liven  thriven  frighten  tighten  lighten  ripen  baryon  prion  whiten  lineman  linemen  titan  pinyon  finespun  funnyman  brighten  enliven  aphelion  cotyledon  linesman  veniremen  bedizen  billycan  enlighten  dicotyledon  perihelion  dandelion  monocotyledon