Greining. or Graining.: How To spell?

The word Greining. is misspelled against Graining., which is past perfect of "Grain"

Word contains consecutive vowels 'AI' in between alphabets gr & ning. is misspelled as 'EI'
Wrong Spelling:  gr-ei-ning. 
Correct Spelling:  gr-ai-ning. 
Find more wrongly spelled words of Graining. to spell it well.

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