cutis vs skin graft

cutis and skin graft both are nouns.

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

As nouns, skin graft is a hyponym of cutis; that is, skin graft is a word with a more specific, narrower meaning than cutis:

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

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