Yes, jowl is a Scrabble word!
...and is worth 14 points in Scrabble, and 17 points in Words with Friends
jowl
Noun
1. The jaw in vertebrates that is hinged to open the mouth
2. A fullness and looseness of the flesh of the lower cheek and jaw (characteristic of aging)
What Scrabble words can I make with the letters in jowl?
3 Letter Words
2 Letter Words