derm vs moult

derm

• The integument of animal; the skin. 

• Synonym of dermis. 

• Guts, entrails. 

moult

• The process of shedding or losing a covering of fur, feathers or skin etc. 

• The skin or feathers cast off during the process of moulting. 

• To shed or lose a covering of hair or fur, feathers, skin, horns, etc, and replace it with a fresh one. 

• To shed in such a manner.