Yes, safe is a Scrabble word!

Adjective

1. Free from danger or the risk of harm

2. (of an undertaking) secure from risk

3. Having reached a base without being put out

4. Financially sound

Noun

1. Strongbox where valuables can be safely kept

2. A ventilated or refrigerated cupboard for securing provisions from pests

3. Contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse