Droned or Drained: How To spell?

The word Droned is misspelled against Drained, which is past tense of "Drain"

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

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