Yes, rich is a Scrabble word!
...and is worth 9 points in Scrabble, and 9 points in Words with Friends
rich
Adjective
1. Possessing material wealth
2. Having an abundant supply of desirable qualities or substances (especially natural resources)
3. Of great worth or quality
4. Marked by great fruitfulness
5. Strong; intense
6. Very productive
7. High in mineral content; having a high proportion of fuel to air
8. Suggestive of or characterized by great expense
9. Containing plenty of fat, or eggs, or sugar
10. Marked by richness and fullness of flavor
11. Pleasantly full and mellow
12. Affording an abundant supply
Noun
1. People who have possessions and wealth (considered as a group)
What Scrabble words can I make with the letters in rich?
3 Letter Words
2 Letter Words