Yes, sling is a Scrabble word!

Verb

1. Hurl as if with a sling

2. Hang loosely or freely; let swing

3. Move with a sling

4. Hold or carry in a sling

Noun

1. A highball with liquor and water with sugar and lemon or lime juice

2. A plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones

3. A shoe that has a strap that wraps around the heel

4. A simple weapon consisting of a looped strap in which a projectile is whirled and then released

5. Bandage to support an injured forearm; consisting of a wide triangular piece of cloth hanging from around the neck