Prosysm or Prosaism: How To spell?

The word Prosysm is misspelled against Prosaism, a noun meaning "That which is in the form of prose writing; a prosaic manner."

Word contains consecutive vowels 'AI' in between alphabets pros & sm is misspelled as 'Y'
Wrong Spelling:  pros-y-sm 
Correct Spelling:  pros-ai-sm 
Find more incorrect spellings of Prosaism to spell right way.

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