Drener or Drainer: How To spell?

The word Drener is misspelled against Drainer, a noun meaning "One who, or that which, drains."

Word contains consecutive vowels 'AI' in between alphabets dr & ner is misspelled as 'E'
Wrong Spelling:  dr-e-ner 
Correct Spelling:  dr-ai-ner 
Explore spell check of Drainer to spell without errors.

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