Yes, action is a Scrabble word!

Verb

1. Institute legal proceedings against; file a suit against

2. Put in effect

Noun

1. Something done (usually as opposed to something said)

2. The state of being active

3. A military engagement

4. A process existing in or produced by nature (rather than by the intent of human beings)

5. The series of events that form a plot

6. The trait of being active and energetic and forceful

7. The operating part that transmits power to a mechanism

8. A judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong

9. An act by a government body or supranational organization

10. The most important or interesting work or activity in a specific area or field