coating vs shoeshine

coating and shoeshine both are nouns.

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

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

coating: 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 coating include glaze.

coating (noun)	shoeshine (noun)
the work of applying something	the act of shining shoes
a thin layer covering something	a shiny finish put on shoes with polish and buffing
a heavy fabric suitable for coats
a decorative texture or appearance of a surface (or the substance that gives it that appearance)