Yes, retirees is a Scrabble word!

Verb

1. Go into retirement; stop performing one's work or withdraw from one's position

2. Withdraw from active participation

3. Pull back or move away or backward

4. Withdraw from circulation or from the market, as of bills, shares, and bonds

5. Break from a meeting or gathering

6. Make (someone) retire

7. Dispose of (something no longer useful or needed)

8. Lose interest

9. Cause to be out on a fielding play

10. Cause to get out

11. Prepare for sleep

Noun

1. Someone who has retired from active working