The word Nawtiluses is misspelled against Nautiluses, which is plural of "Nautilus"
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Word contains consecutive vowels 'AU' in between alphabets n & tiluses is misspelled as 'AW'
Wrong Spelling:  n-aw-tiluses 
Correct Spelling:  n-au-tiluses 
Check more misspelled words of Nautiluses to spell it correct.