Yes, pair is a Scrabble word!
...and is worth 6 points in Scrabble, and 7 points in Words with Friends
pair
Verb
1. Form a pair or pairs
2. Bring two objects, ideas, or people together
3. Occur in pairs
4. Arrange in pairs
5. Engage in sexual intercourse
Noun
1. A set of two similar things considered as a unit
2. Two items of the same kind
3. Two people considered as a unit
4. A poker hand with 2 cards of the same value
What Scrabble words can I make with the letters in pair?
3 Letter Words
2 Letter Words