Yes, funs is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
funs
Noun
1. Activities that are enjoyable or amusing
2. Verbal wit or mockery (often at another's expense but not to be taken seriously)
3. Violent and excited activity
4. A disposition to find (or make) causes for amusement
What Scrabble words can I make with the letters in funs?
3 Letter Words
2 Letter Words