Yes, separate is a Scrabble word!

Verb

1. Act as a barrier between; stand between

2. Force, take, or pull apart

3. Mark as different

4. Separate into parts or portions

5. Divide into components or constituents

6. Arrange or order by classes or categories

7. Make a division or separation

8. Discontinue an association or relation; go different ways

9. Go one's own way; move apart

10. Become separated into pieces or fragments

11. Treat differently on the basis of sex or race

12. Come apart

13. Divide into two or more branches so as to form a fork

Adjective

1. Independent; not united or joint

2. Standing apart; not attached to or supported by anything

3. Separated according to race, sex, class, or religion

4. Have the connection undone; having become separate

Noun

1. A separately printed article that originally appeared in a larger publication

2. A garment that can be purchased separately and worn in combinations with other garments