Yes, board is a Scrabble word!

Verb

1. Get on board of (trains, buses, ships, aircraft, etc.)

2. Live and take one's meals at or in

3. Lodge and take meals (at)

4. Provide food and lodging (for)

Noun

1. A committee having supervisory powers

2. A stout length of sawn timber; made in a wide variety of sizes and used for many purposes

3. A flat piece of material designed for a special purpose

4. Food or meals in general

5. A vertical surface on which information can be displayed to public view

6. A table at which meals are served

7. Electrical device consisting of a flat insulated surface that contains switches and dials and meters for controlling other electrical devices

8. A printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities

9. A flat portable surface (usually rectangular) designed for board games