moulting vs sloughing

moulting and sloughing both are nouns.

Word	Noun	Adjective	Verb	Adverb
moulting	Yes	No	No	No
sloughing	Yes	No	No	No

As nouns, sloughing is a hypernym of moulting; that is, sloughing is a word with a broader meaning than moulting:

moulting: periodic shedding of the cuticle in arthropods or the outer skin in reptiles
sloughing: the process whereby something is shed

Other hypernyms of moulting include shedding.

moulting (noun)	sloughing (noun)
periodic shedding of the cuticle in arthropods or the outer skin in reptiles	the process whereby something is shed