sloughing vs moulting

sloughing and moulting both are nouns.

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

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

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

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

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