Yes, quick is a Scrabble word!

Adverb

1. With little or no delay

Adjective

1. Accomplished rapidly and without delay

2. Hurried and brief

3. Moving quickly and lightly

4. Apprehending and responding with speed and sensitivity

5. Performed with little or no delay

6. Easily aroused or excited

Noun

1. Any area of the body that is highly sensitive to pain (as the flesh underneath the skin or a fingernail or toenail)