Yes, nine is a Scrabble word!
...and is worth 4 points in Scrabble, and 6 points in Words with Friends
nine
Adjective
1. Denoting a quantity consisting of one more than eight and one less than ten
Noun
1. The cardinal number that is the sum of eight and one
2. A team of professional baseball players who play and travel together
3. One of four playing cards in a deck with nine pips on the face
What Scrabble words can I make with the letters in nine?
3 Letter Words
2 Letter Words