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