The following words were inconsistently spelled or hyphenated.

  a-slant / aslant
  black-thorn / blackthorn
  clock-work / clockwork
  down-hill / downhill
  every-day / everyday
  eye-lash / eyelash
  Free-hand / Freehand
  hand-gate / handgate
  head-stall / headstall
  lee-way / leeway
  nose-band / noseband
  race-course / racecourse
  race-horse / racehorse
  steeple-chase / steeplechase
  thorough-bred / thoroughbred