Assoler or Assailer: How To spell?

The word Assoler is misspelled against Assailer, a noun meaning "One who assails."

Word contains consecutive vowels 'AI' in between alphabets ass & ler is misspelled as 'O'
Wrong Spelling:  ass-o-ler 
Correct Spelling:  ass-ai-ler 
Find more incorrect spellings of Assailer to spell right way.

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