Thraider or Threader: How To spell?

The word Thraider is misspelled against Threader, a noun meaning "A device for assisting in threading a needle."

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

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