plastering vs coating

plastering and coating both are nouns.

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

As nouns, coating is a hypernym of plastering; that is, coating is a word with a broader meaning than plastering:

Other hypernyms of plastering include application, covering.

plastering (noun)	coating (noun)
the application of plaster	the work of applying something
	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)