How to spell JOOUL correctly?

The misspelling "jooul" can possibly be corrected to "jewel", "joule" or "jowl". "Jewel" refers to a precious gemstone. "Joule" is the unit of energy. "Jowl" refers to a muscular cheek in animals or meat that comes from the jaw of a pig or cow. Contextual clues can help in determining the correct word.