shedding vs moulting

shedding and moulting both are nouns.

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

As nouns, moulting is a hyponym of shedding; that is, moulting is a word with a more specific, narrower meaning than shedding:

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

Other hyponyms of shedding include abscission, ecdysis, molt, molting, moult.

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