tegument vs cuticle

tegument and cuticle both are nouns.

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

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

tegument (noun)	cuticle (noun)
a natural protective body covering and site of the sense of touch	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