Yes, tup is a Scrabble word!
...and is worth 5 points in Scrabble, and 7 points in Words with Friends
tup
Noun
1. Uncastrated adult male sheep
What Scrabble words can I make with the letters in tup?
3 Letter Words
2 Letter Words
Noun
1. Uncastrated adult male sheep
3 Letter Words
2 Letter Words