Yes, duct is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
duct
Noun
1. A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
2. A continuous tube formed by a row of elongated cells lacking intervening end walls
3. An enclosed conduit for a fluid
What Scrabble words can I make with the letters in duct?
3 Letter Words
2 Letter Words