Here's what rhymes with unfrightening.
                        
                        
                    
                                frightening  lightening  tightening  brightening  heightening  enlightening  Words that almost rhyme with unfrightening
ripening  widening  likening  livening  licensing  rioting  rivalling  rivaling  siphoning  titling  cycling  silencing  dialing  dieting  piloting  spiraling  enlivening  spiralling  pirating  dialling  sniveling  libeling  recycling  entitling  quieting  sidling  playacting  redialing  redialling  disquieting  motorcycling