Greoning or Graining: How To spell?

The word Greoning is misspelled against Graining, a noun meaning "A process in dressing leather, by which the skin is softened and the grain raised."

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

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