Greon or Grain: How To spell?

The word Greon is misspelled against Grain, a noun meaning "A blade of a sword, knife, etc."

Word contains consecutive vowels 'AI' in between alphabets gr & n is misspelled as 'EO'
Wrong Spelling:  gr-eo-n 
Correct Spelling:  gr-ai-n 
Find more incorrect spellings of Grain to spell right way.

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