Stirup or Stirrup: How To spell?
The word Stirup is misspelled against Stirrup, a verb meaning "A kind of ring, or bent piece of metal, wood, leather, or the like, horizontal in one part for receiving the foot of a rider, and attached by a strap to the saddle, -- used to assist a person in mounting a horse, and to enable him to sit steadily in riding, as well as to relieve him by supporting a part of the weight of the body."
Stirrup has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings sti & up which should not be misspelled with single 'R'
Wrong Spelling:  sti-r-up  Correct Spelling:  sti-rr-up 
Check more misspelled words of Stirrup to spell it correct.