Yes, rip is a Scrabble word!

Verb

1. Tear or be torn violently

2. Move precipitously or violently

3. Cut (wood) along the grain

4. Criticize or abuse strongly and violently

Noun

1. A dissolute man in fashionable society

2. An opening made forcibly as by pulling apart

3. A stretch of turbulent water in a river or the sea caused by one current flowing into or across another current

4. The act of rending or ripping or splitting something