junction vs anastomosis

junction and anastomosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
junction	Yes	No	No	No
anastomosis	Yes	No	No	No

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

junction: the state of being joined together
anastomosis: a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous

Other hyponyms of junction include inosculation, synapse.

junction (noun)	anastomosis (noun)
an act of joining or adjoining things	a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous
the place where two or more things come together
something that joins or connects
the shape or manner in which things come together and a connection is made
the state of being joined together