Yes, ridge is a Scrabble word!

Verb

1. Extend in ridges

2. Plough alternate strips by throwing the furrow onto an unploughed strip

3. Throw soil toward (a crop row) from both sides

4. Spade into alternate ridges and troughs

5. Form into a ridge

Noun

1. A long narrow natural elevation or striation

2. Any long raised strip

3. A long narrow natural elevation on the floor of the ocean

4. A long narrow range of hills

5. Any long raised border or margin of a bone or tooth or membrane

6. A beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters