graft vs conjoin

graft is a noun but conjoin is not a noun.

Word	Noun	Adjective	Verb	Adverb
graft	Yes	No	Yes	No
conjoin	No	No	Yes	No

As verbs, conjoin is a hypernym of graft; that is, conjoin is a word with a broader meaning than graft:

Other hypernyms of graft include join.

graft (noun)	conjoin (noun)
the act of grafting something onto something else
the practice of offering something (usually money) in order to gain an illicit advantage
(surgery) tissue or organ transplanted from a donor to a recipient; in some cases the patient can be both donor and recipient

graft (verb)	conjoin (verb)
cause to grow together parts from different plants	make contact or come together
place the organ of a donor into the body of a recipient	take in marriage; married