Yes, lid is a Scrabble word!
...and is worth 4 points in Scrabble, and 5 points in Words with Friends
lid
Noun
1. Either of two folds of skin that can be moved to cover or open the eye
2. A movable top or cover (hinged or separate) for closing the opening at the top of a box, chest, jar, pan, etc.
3. Headdress that protects the head from bad weather; has shaped crown and usually a brim
What Scrabble words can I make with the letters in lid?
2 Letter Words