Yes, molt is a Scrabble word!
...and is worth 6 points in Scrabble, and 8 points in Words with Friends
molt
Verb
1. Cast off hair, skin, horn, or feathers
Noun
1. Periodic shedding of the cuticle in arthropods or the outer skin in reptiles
What Scrabble words can I make with the letters in molt?
3 Letter Words
2 Letter Words