The word Achillaun is misspelled against Achillean, meaning "Invulnerable."
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Achillean has vowels 'ea' together mispronounced as 'au'
Word contains consecutive vowels 'EA' in between alphabets achill & n is misspelled as 'AU'
Wrong Spelling:  achill-au-n 
Correct Spelling:  achill-ea-n 
Check more misspelled words of Achillean to spell it correct.