coating vs gilding

coating and gilding both are nouns.

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

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

coating (noun)	gilding (noun)
the work of applying something	a coating of gold or of something that looks like gold
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)