junction vs splicing

junction and splicing both are nouns.

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

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

junction: something that joins or connects
splicing: a junction where two things (as paper or film or magnetic tape) have been joined together

Other hyponyms of junction include contact, tangency, joint, barrier strip, junction barrier, splice, thermojunction.

junction (noun)	splicing (noun)
an act of joining or adjoining things	a junction where two things (as paper or film or magnetic tape) have been joined together
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