Here's what rhymes with ducai.
                        
                        
                    
                                guy  chi  quae  kai  by  my  high  why  die  lie  thy  y  buy  cry  sky  tie  vi  hi  shy  sigh  bi  bye  dye  fi  hy  nigh  pi  pie  thai  thigh  vie  dei  ly  psi  rye  ty  wir  awry  hai  lye  mai  muy  nai  wry  cy  fy  lai  luy  mei  sy  tai  thei  wai  phi  dry  try  fly  deny  defy  spy  fry  ply  sly  pry  tri  trie  belie  decry  pri  pupae  sty  aquae  stye  turfy  slier  apply  rely  nuclei  goodbye  untie  descry  edify  bonsai  deify  spry  amebae  stupefy  lanai  scurfy  drachmai  banzais  supply  reply  thereby  imply  nearby  occupy  whereby  comply  hereby  modify  alkali  certify  notify  underlie  alibi  pacify  ratify  unify  beautify  termini  terrify  typify  amoebae  codify  dignify  overlie  ossify  retry  triply  blowfly  barfly  shanghai  ripply  overbuy  yuppify  justify  satisfy  clarify  qualify  specify  classify  signify  testify  verify  butterfly  glorify  gratify  purify  amplify  fortify  magnify  nullify  rectify  samurai  standby  lullaby  crucify  liquefy  mollify  mortify  ramify  vilify  acidify  firefly  mystify  ultrahigh  vivify  calcify  horrify  petrify  reunify  liquify  overfly  scarify  versify  mummify  prettify  vitrify  beatify  speechify  dandify  identify  stimuli  multiply  simplify  quantify  alveoli  diversify  falsify  solidify  objectify  personify  resupply  detoxify  dragonfly  preoccupy  stratify  stultify  misapply  cumuli  declassify  hyperbolae  gentrify  refortify  syllabify  intensify  disqualify  indemnify  oversupply  demystify  electrify  emulsify  reclassify  revivify  dissatisfy  exemplify  solemnify  oversimplify  misidentify  transmogrify