Stifener or Stiffener: How To spell?
The word Stifener is misspelled against Stiffener, a noun meaning "One who, or that which, stiffens anything, as a piece of stiff cloth in a cravat."
Stiffener has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Sti & ener which should not be misspelled with single 'F'
Wrong Spelling:  Sti-f-ener  Correct Spelling:  Sti-ff-ener 
Find more wrongly spelled words of Stiffener to spell it well.