Suston or Sustain: How To spell?

The word Suston is misspelled against Sustain, a noun meaning "One who, or that which, upholds or sustains; a sustainer."

Word contains consecutive vowels 'AI' in between alphabets sust & n is misspelled as 'O'
Wrong Spelling:  sust-o-n 
Correct Spelling:  sust-ai-n 
Check more misspelled words of Sustain to spell it correct.

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