Yes, duad is a Scrabble word!
...and is worth 6 points in Scrabble, and 7 points in Words with Friends
duad
Noun
1. Two items of the same kind
What Scrabble words can I make with the letters in duad?
3 Letter Words
2 Letter Words
Noun
1. Two items of the same kind
3 Letter Words
2 Letter Words