joint vs junction

joint and junction both are nouns.

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

As nouns, junction is a hypernym of joint; that is, junction is a word with a broader meaning than joint:

Other hypernyms of joint include conjunction.

As nouns, joint and junction are synonyms defined as:

joint and junction: the shape or manner in which things come together and a connection is made

Other synonyms of joint include articulation, join, juncture.

joint (noun)	junction (noun)
marijuana leaves rolled into a cigarette for smoking	an act of joining or adjoining things
junction by which parts or objects are joined together	the place where two or more things come together
a disreputable place of entertainment	something that joins or connects
(anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)	the shape or manner in which things come together and a connection is made
a piece of meat roasted or for roasting and of a size for slicing into more than one portion	the state of being joined together
the shape or manner in which things come together and a connection is made

joint (adjective)	junction (adjective)
united or combined
involving both houses of a legislature
affecting or involving two or more