cuticle vs cuticula

cuticle and cuticula both are nouns.

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

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

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

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