Yes, trough is a Scrabble word!

Noun

1. A narrow depression (as in the earth or between ocean waves or in the ocean bed)

2. A channel along the eaves or on the roof; collects and carries away rainwater

3. A concave shape with an open top

4. A treasury for government funds

5. A long narrow shallow receptacle

6. A container (usually in a barn or stable) from which cattle or horses feed