Construner or Constrainer: How To spell?

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

Word contains consecutive vowels 'AI' in between alphabets constr & ner is misspelled as 'U'
Wrong Spelling:  constr-u-ner 
Correct Spelling:  constr-ai-ner 
Check more misspelled words of Constrainer to spell it correct.

You might be interested to know

Dumios or Daimios?

Derunment or Derainment?

Distruning or Distraining?