Neassant or Naissant: How To spell?

The word Neassant is misspelled against Naissant, an adjective meaning "Same as Jessant."

Word contains consecutive vowels 'AI' in between alphabets n & ssant is misspelled as 'EA'
Wrong Spelling:  n-ea-ssant 
Correct Spelling:  n-ai-ssant 
Explore spell check of Naissant to spell without errors.

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