coat vs finishing coat

coat and finishing coat both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat	Yes	No	Yes	No
finishing coat	Yes	No	No	No

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

coat (noun)	finishing coat (noun)
growth of hair or wool or fur covering the body of an animal	the final coating of (e.g., paint, plaster, varnish, etc.)
an outer garment that has sleeves and covers the body from shoulder down; worn outdoors
a thin layer covering something

coat (verb)	finishing coat (verb)
cover or provide with a coat
put a coat on; cover the surface of; furnish with a surface
form a coat over