moulting vs shedding

moulting and shedding both are nouns.

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

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

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

Other hypernyms of moulting include sloughing.

moulting (noun)	shedding (noun)
periodic shedding of the cuticle in arthropods or the outer skin in reptiles	loss of bits of outer skin by peeling or shedding or coming off in scales
	the process whereby something is shed