Entreon or Entrain: How To spell?

The word Entreon is misspelled against Entrain, a verb meaning "To go aboard a railway train; as, the troops entrained at the station."

Word contains consecutive vowels 'AI' in between alphabets entr & n is misspelled as 'EO'
Wrong Spelling:  entr-eo-n 
Correct Spelling:  entr-ai-n 
Find more incorrect spellings of Entrain to spell right way.

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