Geynpeyn or Gainpain: How To spell?

The word Geynpeyn is misspelled against Gainpain, a noun meaning "Bread-gainer; -- a term applied in the Middle Ages to the sword of a hired soldier."

Word contains consecutive vowels 'AI' twice is misspelled as 'EY'
Wrong Spelling:  g-ey-np-ey-n 
Correct Spelling:  g-ai-np-ai-n 
Explore spell check of Gainpain to spell without errors.

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