moulting vs ecdysis

moulting and ecdysis both are nouns.

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

As nouns, moulting and ecdysis are synonyms defined as:

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

Other synonyms of moulting include molt, molting, moult.

moulting (noun)	ecdysis (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