molt vs moulting

molt and moulting both are nouns.

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

As nouns, molt and moulting are synonyms defined as:

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

Other synonyms of molt include ecdysis, molting, moult.

molt (noun)	moulting (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

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