123 test HARDEST words Vocabulary

Puzzled by the hardest words in the test? Here are the rarest words we included, in order of increasing difficulty. They each occur in English less than 3 times per hundred million words, but they do occur. Click on any word to open its definition in a new tab/window.
captious  -  bibulous  -  malapropism  -  tricorn  -  tenebrous  -  braggadocio  -  bruit  -  embonpoint  -  pabulum  -  parlay  -  pother  -  valetudinarian  -  cenacle  -  hypermnesia  -  legerdemain  -  vibrissae  -  cantle  -  estivation  -  myrmidon  -  regnant  -  terpsichorean  -  clerisy  -  deracinate  -  fuliginous  -  oneiromancy  -  tatterdemalion  -  williwaw  -  caitiff  -  funambulist  -  hypnopompic  -  opsimath  -  pule  -  sparge  -  uxoricide