Marader or Marauder: How To spell?

The word Marader is misspelled against Marauder, a verb meaning "A rover in quest of booty or plunder; a plunderer; one who pillages."

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