Draonable or Drainable: How To spell?

The word Draonable is misspelled against Drainable, an adjective meaning "Capable of being drained."

Word contains consecutive vowels 'AI' in between alphabets dr & nable is misspelled as 'AO'
Wrong Spelling:  dr-ao-nable 
Correct Spelling:  dr-ai-nable 
Find more incorrect spellings of Drainable to spell right way.

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