Yes, retreat is a Scrabble word!

Verb

1. Pull back or move away or backward

2. Move away, as for privacy

3. Move back

4. Make a retreat from an earlier commitment or activity

Noun

1. (military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat

2. A place of privacy; a place affording peace and quiet

3. (military) a signal to begin a withdrawal from a dangerous position

4. (military) a bugle call signaling the lowering of the flag at sunset

5. An area where you can be alone

6. Withdrawal for prayer and study and meditation

7. The act of withdrawing or going backward (especially to escape something hazardous or unpleasant)