Yes, belt is a Scrabble word!

Verb

1. Sing loudly and forcefully

2. Deliver a blow to

3. Fasten with a belt

Noun

1. Endless loop of flexible material between two rotating shafts or pulleys

2. A band to tie or buckle around the body (usually at the waist)

3. An elongated region where a specific condition or characteristic is found

4. A vigorous blow

5. A path or strip (as cut by one course of mowing)

6. Ammunition (usually of small caliber) loaded in flexible linked strips for use in a machine gun

7. The act of hitting vigorously