finishing vs shoeshine

finishing and shoeshine both are nouns.

Word	Noun	Adjective	Verb	Adverb
finishing	Yes	No	No	No
shoeshine	Yes	No	No	No

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

finishing: a decorative texture or appearance of a surface (or the substance that gives it that appearance)
shoeshine: a shiny finish put on shoes with polish and buffing

Other hyponyms of finishing include glaze.

finishing (noun)	shoeshine (noun)
the act of finishing	the act of shining shoes
a decorative texture or appearance of a surface (or the substance that gives it that appearance)	a shiny finish put on shoes with polish and buffing