Yes, edge is a Scrabble word!

Verb

1. Advance slowly, as if by inches

2. Provide with a border or edge

3. Lie adjacent to another or share a boundary

4. Provide with an edge

Noun

1. The boundary of a surface

2. A line determining the limits of an area

3. A sharp side formed by the intersection of two surfaces of an object

4. The attribute of urgency in tone of voice

5. A slight competitive advantage

6. The outside limit of an object or area or surface; a place farthest away from the center of something