Twayn or Twain: How To spell?

The word Twayn is misspelled against Twain, an adjective meaning "Two; -- nearly obsolete in common discourse, but used in poetry and burlesque."

Word contains consecutive vowels 'AI' in between alphabets tw & n is misspelled as 'AY'
Wrong Spelling:  tw-ay-n 
Correct Spelling:  tw-ai-n 
Browse incorrect spellings of Twain to spell it good.

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