junction vs T-junction

junction and T-junction both are nouns.

Word	Noun	Adjective	Verb	Adverb
junction	Yes	No	No	No
T-junction	Yes	No	No	No

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

junction (noun)	T-junction (noun)
an act of joining or adjoining things	a junction where two roads or pipes etc. meet to form a T
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