Caser or Causer: How To spell?

The word Caser is misspelled against Causer, a noun meaning "One who or that which causes."

Word contains consecutive vowels 'AU' in between alphabets c & ser is misspelled as 'A' as letter 'U' is phonetically ignored
Wrong Spelling: c-a-ser
Correct Spelling: c-au-ser
Explore spell check of Causer to spell without errors.