carapace vs cuticula

carapace and cuticula both are nouns.

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

As nouns, cuticula is a hyponym of carapace; that is, cuticula is a word with a more specific, narrower meaning than carapace:

carapace: hard outer covering or case of certain organisms such as arthropods and turtles
cuticula: the outer body wall of an insect

carapace (noun)	cuticula (noun)
hard outer covering or case of certain organisms such as arthropods and turtles	the outer body wall of an insect