skin graft vs tegument

skin graft and tegument both are nouns.

Word	Noun	Adjective	Verb	Adverb
skin graft	Yes	No	No	No
tegument	Yes	No	No	No

As nouns, tegument is a hypernym of skin graft; that is, tegument is a word with a broader meaning than skin graft:

skin graft: a piece of skin taken from a donor area and surgically grafted at the site of an injury or burn
tegument: a natural protective body covering and site of the sense of touch

Other hypernyms of skin graft include cutis, skin.

skin graft (noun)	tegument (noun)
a piece of skin taken from a donor area and surgically grafted at the site of an injury or burn	a natural protective body covering and site of the sense of touch