moulting vs moult

moulting and moult both are nouns.

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

As nouns, moulting and moult are synonyms defined as:

moulting and moult: periodic shedding of the cuticle in arthropods or the outer skin in reptiles

Other synonyms of moulting include ecdysis, molt, molting.

moulting (noun)	moult (noun)
periodic shedding of the cuticle in arthropods or the outer skin in reptiles	periodic shedding of the cuticle in arthropods or the outer skin in reptiles

moulting (verb)	moult (verb)
	cast off hair, skin, horn, or feathers