Yes, smarts is a Scrabble word!
...and is worth 8 points in Scrabble, and 9 points in Words with Friends
smarts
Verb
1. Be the source of pain
Noun
1. A kind of pain such as that caused by a wound or a burn or a sore
What Scrabble words can I make with the letters in smarts?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words