Yes, turf is a Scrabble word!
...and is worth 7 points in Scrabble, and 8 points in Words with Friends
turf
Verb
1. Cover (the ground) with a surface layer of grass or grass roots
Noun
1. Surface layer of ground containing a mat of grass and grass roots
2. The territory claimed by a juvenile gang as its own
3. Range of jurisdiction or influence
What Scrabble words can I make with the letters in turf?
3 Letter Words
2 Letter Words