Yes, cause is a Scrabble word!

Verb

1. Give rise to; cause to happen or occur, not always intentionally

2. Cause to do; cause to act in a specified manner

Noun

1. Events that provide the generative force that is the origin of something

2. A justification for something existing or happening

3. A series of actions advancing a principle or tending toward a particular end

4. Any entity that produces an effect or is responsible for events or results

5. A comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy