Seisonal or Seasonal: How To spell?

The word Seisonal is misspelled against Seasonal, an adjective meaning "pertaining to the seasons."

Seasonal has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets s & sonal is misspelled as 'EI'
Wrong Spelling:  s-ei-sonal 
Correct Spelling:  s-ea-sonal 
Find more incorrect spellings of Seasonal to spell right way.

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