Threyder or Threader: How To spell?
The word Threyder is misspelled against Threader, a noun meaning "A device for assisting in threading a needle."
Threader has vowels 'ea' together mispronounced as 'ey'Word contains consecutive vowels 'EA' in between alphabets thr & der is misspelled as 'EY'
Wrong Spelling:  thr-ey-der  Correct Spelling:  thr-ea-der 
Explore spell check of Threader to spell without errors.