Here's what rhymes with excrementitious.
                        
                        
                    
                                ambitious  vicious  unambitious  delicious  fictitious  judicious  malicious  pernicious  auspicious  nutritious  seditious  injudicious  officious  suspicious  capricious  adventitious  propitious  avaricious  factitious  repetitious  unpropitious  expeditious  surreptitious  superstitious  Words that almost rhyme with excrementitious
dishes  fishes  kisses  misses  militias  bishops  business  digits  tickets  pickets  bigness  billets  dimness  discus  indigence  pittance  bigots  cirrus  distance  appearance  minutes  limits  spirits  witness  thickness  fitness  sickness  inhibits  richness  stiffness  stillness  bacillus  biscuits  citrus  fearless  viscous  grimace  litmus  papyrus  thickets  hillocks  pivots  sinless  sinuous  religious  visits  adherence  clearance  exhibits  insistence  mistress  prodigious  admittance  brilliance  pigments  prestigious  archbishops  assiduous  diffidence  eyewitness  frigates  listless  meniscus  quickness  rivets  trinkets  crickets  cystitis  irreligious  triplets  unfitness  existence  assistance  interference  forgiveness  persistence  adherents  coherence  shipments  hindrance  prohibits  elicits  reappearance  strictness  swiftness  incoherence  remittance  resistless  transmittance  resistance  coefficients  assistants  disappearance  subsistence  perseverance  contingents  distinctness  reminiscence  consistence  commitments  coexistence  delinquents  eucalyptus  infringements  nonexistence