Yes, zones is a Scrabble word!

Verb

1. Regulate housing in; of certain areas of towns

2. Separate or apportion into sections

Noun

1. A locally circumscribed place characterized by some distinctive features

2. Any of the regions of the surface of the Earth loosely divided according to latitude or longitude

3. An area or region distinguished from adjacent parts by a distinctive feature or characteristic

4. (anatomy) any encircling or beltlike structure