Constroner or Constrainer: How To spell?
The word Constroner is misspelled against Constrainer, a noun meaning "One who constrains."
Word contains consecutive vowels 'AI' in between alphabets constr & ner is misspelled as 'O'Wrong Spelling:  constr-o-ner  Correct Spelling:  constr-ai-ner 
Find more incorrect spellings of Constrainer to spell right way.