Pleonsman or Plainsman: How To spell?

The word Pleonsman is misspelled against Plainsman, a noun meaning "One who lives in the plains."

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

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