coat of paint vs coating

coat of paint and coating both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat of paint	Yes	No	No	No
coating	Yes	No	No	No

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

Other hypernyms of coat of paint include coat.

coat of paint (noun)	coating (noun)
a layer of paint covering something else	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)