Yes, swim is a Scrabble word!
...and is worth 9 points in Scrabble, and 10 points in Words with Friends
swim
Verb
1. Travel through water
2. Be afloat either on or below a liquid surface and not sink to the bottom
3. Be dizzy or giddy
4. Be covered with or submerged in a liquid
5. Move as if gliding through water
Noun
1. The act of swimming
What Scrabble words can I make with the letters in swim?
3 Letter Words
2 Letter Words