Molt
Part of speech: noun
Definition: The skin or feathers cast off during the process of molting.
Part of speech: verb
Definition: To shed hair, feathers, skin, horns etc. and replace it by a fresh layer. To shed in such a manner.
Moult
Part of speech: verb
Definition: To shed or lose a covering of fur, feathers or skin etc.
Part of speech: noun
Definition: The process of shedding or losing a covering of fur, feathers or skin etc.