Yes, stay is a Scrabble word!

Verb

1. Stay the same; remain in a certain state

2. Stay put (in a certain place); we are not moving to Cincinnati"

3. Dwell

4. Continue in a place, position, or situation

5. Remain behind

6. Stop or halt

7. Stay behind

8. Hang on during a trial of endurance

9. Stop a judicial process

10. Fasten with stays

11. Overcome or allay

Noun

1. Continuing or remaining in a place or state

2. The state of inactivity following an interruption

3. A judicial order forbidding some action until an event occurs or the order is lifted

4. A thin strip of metal or bone that is used to stiffen a garment (e.g. a corset)

5. (nautical) brace consisting of a heavy rope or wire cable used as a support for a mast or spar