Constreoner or Constrainer: How To spell?

The word Constreoner is misspelled against Constrainer, a noun meaning "One who constrains."

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

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