Yes, gall is a Scrabble word!

Verb

1. Become or make sore by or as if by rubbing

2. Irritate or vex

Noun

1. An open sore on the back of a horse caused by ill-fitting or badly adjusted saddle

2. A skin sore caused by chafing

3. Abnormal swelling of plant tissue caused by insects or microorganisms or injury

4. A feeling of deep and bitter anger and ill-will

5. A digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats

6. The trait of being rude and impertinent; inclined to take liberties