Yes, tool is a Scrabble word!

Verb

1. Drive

2. Ride in a car with no particular goal and just for the pleasure of it

3. Furnish with tools

4. Work with a tool

Noun

1. An implement used in the practice of a vocation

2. The means whereby some act is accomplished

3. A person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else

4. Obscene terms for penis