Thradworm or Threadworm: How To spell?

The word Thradworm is misspelled against Threadworm, a noun meaning "Any long, slender nematode worm, especially the pinworm and filaria."

Threadworm has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets thr & dworm is misspelled as 'A'
Wrong Spelling:  thr-a-dworm 
Correct Spelling:  thr-ea-dworm 
Find more incorrect spellings of Threadworm to spell right way.

You might be interested to know

Tradle or Treadle?

Unclan or Unclean?

Unlash or Unleash?