molting vs ecdysis

molting and ecdysis both are nouns.

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

As nouns, molting and ecdysis are synonyms defined as:

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

Other synonyms of molting include molt, moult, moulting.

molting (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