Retonable or Retainable: How To spell?

The word Retonable is misspelled against Retainable, an adjective meaning "Capable of being retained."

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

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