Here's what rhymes with mutant.
                        
                        
                    
                                pollutant  annuitant  disputant  Words that almost rhyme with mutant
prudent  student  imprudent  impudent  unit  fluent  coolant  souvent  truant  loosest  rootlet  movement  amusement  newest  tumult  adjuvant  diluent  fewest  mouvement  rudest  coolest  soonest  bluest  cruelest  duellist  lewdest  improvement  pursuant  recruitment  inducement  confluent  crudest  smoothest  intuit  oculist  shrewdest  entombment  insouciant  hugest  sunhat  nudest  gruesomest  translucent  cartoonist  canoeist  bassoonist  obtusest  profusest  quadruplet