Tred or Tread: How To spell?

The word Tred is misspelled against Tread, a noun meaning "A bruise or abrasion produced on the foot or ankle of a horse that interferes. See Interfere, 3."

Tread has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets tr & d is misspelled as 'E'
Wrong Spelling:  tr-e-d 
Correct Spelling:  tr-ea-d 
Explore spell check of Tread to spell without errors.

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