Here's what rhymes with incredulus.
                        
                        
                    
                                talus  fistulous  bibulous  Words that almost rhyme with incredulus
mullahs  duchess  dullness  dulness  piteous  bulbous  pumice  tapas  pashas  justice  buckets  buttocks  fulness  toughness  baseness  bloodless  buttress  puppets  stasis  doublets  luckless  cutlass  loveless  buffets  ductless  dumbness  erogenous  fungous  magus  ruckus  abundance  compass  colourless  fungus  oneness  roughness  couplets  numbness  rashness  stomachs  justness  lameness  nuggets  alumnus  hummocks  pedants  agreeableness  bumptious  couscous  covets  rumpus  judgments  indulgence  judgements  muskets  trumpets  wondrous  cements  lustrous  neuritis  repugnance  robustness  abruptness  abutments  cumbrous  wantonness  bluntness  druggists  effulgence  incubus  numinous  smugness  rambunctious  sibilants  suitableness  substance  adjustments  reluctance  conductance  encompass  inductance  reasonableness  sumptuous  unrighteousness  resultants  circumference  consultants  hundredths  readjustments  unreasonableness  discussants  overabundance  overindulgence  incumbents  remonstrance  encumbrance  superabundance  incumbrance