Prorial or Prairial: How To spell?

The word Prorial is misspelled against Prairial, a noun meaning "The ninth month of the French Republican calendar, which dated from September 22, 1792. It began May, 20, and ended June 18. See Vendemiaire."

Word contains consecutive vowels 'AI' in between alphabets pr & rial is misspelled as 'O'
Wrong Spelling:  pr-o-rial 
Correct Spelling:  pr-ai-rial 
Find more incorrect spellings of Prairial to spell right way.

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