Yes, score is a Scrabble word!

Verb

1. Gain points in a game

2. Make small marks into the surface of

3. Make underscoring marks

4. Write a musical score for

5. Induce to have sex

6. Get a certain number or letter indicating quality or performance

7. Assign a grade or rank to, according to one's evaluation

Noun

1. A number or letter indicating quality (especially of a student's performance)

2. A written form of a musical composition; parts for different instruments appear on separate staves on large pages

3. A number that expresses the accomplishment of a team or an individual in a game or contest

4. A set of twenty members

5. Grounds

6. The facts about an actual situation

7. An amount due (as at a restaurant or bar)

8. A slight surface cut (especially a notch that is made to keep a tally)

9. A resentment strong enough to justify retaliation

10. The act of scoring in a game or sport

11. A seduction culminating in sexual intercourse