Dreoned or Drained: How To spell?

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

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