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