Colossan or Colossean: How To spell?

The word Colossan is misspelled against Colossean, an adjective meaning "Colossal."

Colossean has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets coloss & n is misspelled as 'A'
Wrong Spelling:  coloss-a-n 
Correct Spelling:  coloss-ea-n 
Find more incorrect spellings of Colossean to spell right way.

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