Restraener or Restrainer: How To spell?

The word Restraener is misspelled against Restrainer, a noun meaning "One who, or that which, restrains."

Word contains consecutive vowels 'AI' in between alphabets restr & ner is misspelled as 'AE'
Wrong Spelling:  restr-ae-ner 
Correct Spelling:  restr-ai-ner 
Explore spell check of Restrainer to spell without errors.

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