Geinpein or Gainpain: How To spell?

The word Geinpein 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 'EI'
Wrong Spelling:  g-ei-np-ei-n 
Correct Spelling:  g-ai-np-ai-n 
Find more wrongly spelled words of Gainpain to spell it well.

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