Yes, answer is a Scrabble word!

Verb

1. React verbally

2. Respond to a signal

3. Give the correct answer or solution to

4. Understand the meaning of

5. Give a defence or refutation of (a charge) or in (an argument)

6. Be liable or accountable

7. Be sufficient; be adequate, either in quality or quantity

8. Match or correspond

9. Be satisfactory for; meet the requirements of or serve the purpose of

10. React to a stimulus or command

Noun

1. A statement (either spoken or written) that is made to reply to a question or request or criticism or accusation

2. A statement that solves a problem or explains how to solve the problem

3. The speech act of replying to a question

4. The principal pleading by the defendant in response to plaintiff's complaint; in criminal law it consists of the defendant's plea of `guilty' or `not guilty' (or nolo contendere); in civil law it must contain denials of all allegations in the plaintiff's complaint that the defendant hopes to controvert and it can contain affirmative defenses or counterclaims

5. A nonverbal reaction