carapace vs cuticle

carapace and cuticle both are nouns.

Word	Noun	Adjective	Verb	Adverb
carapace	Yes	No	No	No
cuticle	Yes	No	No	No

As nouns, carapace and cuticle are synonyms defined as:

carapace and cuticle: hard outer covering or case of certain organisms such as arthropods and turtles

Other synonyms of carapace include shell, shield.

carapace (noun)	cuticle (noun)
hard outer covering or case of certain organisms such as arthropods and turtles	hard outer covering or case of certain organisms such as arthropods and turtles
	the outer layer of the skin covering the exterior body surface of vertebrates
	the dead skin at the base of a fingernail or toenail