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