Yes, jade is a Scrabble word!

Verb

1. Lose interest or become bored with something or somebody

2. Exhaust or get tired through overuse or great strain or stress

Adjective

1. Of something having the color of jade; especially varying from bluish green to yellowish green

Noun

1. A semiprecious gemstone that takes a high polish; is usually green but sometimes whitish; consists of jadeite or nephrite

2. A woman adulterer

3. A light green color varying from bluish green to yellowish green

4. An old or over-worked horse