Reunbow or Rainbow: How To spell?

The word Reunbow is misspelled against Rainbow, a noun meaning "A bow or arch exhibiting, in concentric bands, the several colors of the spectrum, and formed in the part of the hemisphere opposite to the sun by the refraction and reflection of the sun's rays in drops of falling rain."

Word contains consecutive vowels 'AI' in between alphabets r & nbow is misspelled as 'EU'
Wrong Spelling:  r-eu-nbow 
Correct Spelling:  r-ai-nbow 
Check more misspelled words of Rainbow to spell it correct.

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