Yes, spur is a Scrabble word!

Verb

1. Incite or stimulate

2. Give heart or courage to

3. Strike with a spur

4. Goad with spurs

5. Equip with spurs

Noun

1. A verbalization that encourages you to attempt something

2. Any sharply pointed projection

3. Tubular extension at the base of the corolla in some flowers

4. A sharp prod fixed to a rider's heel and used to urge a horse onward

5. A railway line connected to a trunk line