Threyding or Threading: How To spell?

The word Threyding is misspelled against Threading, which is present continuous of "Thread"

Threading has vowels 'ea' together mispronounced as 'ey'
Word contains consecutive vowels 'EA' in between alphabets thr & ding is misspelled as 'EY'
Wrong Spelling:  thr-ey-ding 
Correct Spelling:  thr-ea-ding 
Find more wrongly spelled words of Threading to spell it well.

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