coating vs paperhanging

coating and paperhanging both are nouns.

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

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

coating (noun)	paperhanging (noun)
the work of applying something	the application of wallpaper
a thin layer covering something
a heavy fabric suitable for coats
a decorative texture or appearance of a surface (or the substance that gives it that appearance)