Yes, note is a Scrabble word!

Verb

1. Make mention of

2. Notice or perceive

3. Observe with care or pay close attention to

4. Make a written note of

Noun

1. A brief written record

2. A short personal letter

3. A notation representing the pitch and duration of a musical sound

4. A tone of voice that shows what the speaker is feeling

5. A characteristic emotional quality

6. A piece of paper money (especially one issued by a central bank)

7. A comment or instruction (usually added)

8. High status importance owing to marked superiority

9. A promise to pay a specified amount on demand or at a certain time