Is “Tooth” a Scrabble word?

1. 1.A hard, calcareous structure present in the mouth of many vertebrate animals, generally used for eating.

2. 2.A sharp projection on the blade of a saw or similar implement.

3. 3.A projection on the edge of a gear that meshes with similar projections on adjacent gears, or on the circumference of a cog that engages with a chain.

Synonyms: appetite, fondness, palate, taste

1. 1.To provide or furnish with teeth.

2. 2.To indent; to jag.

   “to tooth a saw”

3. 3.To lock into each other, like gear wheels.