Yes, guards is a Scrabble word!

Verb

1. To keep watch over

2. Watch over or shield from danger or harm; protect

3. Protect against a challenge or attack

4. Take precautions in order to avoid some unwanted consequence

Noun

1. A person who keeps watch over something or someone

2. The person who plays that position on a football team

3. A device designed to prevent injury or accidents

4. A posture of defence in boxing or fencing

5. The person who plays the position of guard on a basketball team

6. A military unit serving to protect some place or person

7. A precautionary measure warding off impending danger or damage or injury etc.

8. The duty of serving as a sentry

9. (American football) a position on the line of scrimmage

10. A position on a basketball team