coat vs metal plating

coat and metal plating both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat	Yes	No	Yes	No
metal plating	Yes	No	No	No

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

coat (noun)	metal plating (noun)
growth of hair or wool or fur covering the body of an animal	a thin coating of metal deposited on a surface
an outer garment that has sleeves and covers the body from shoulder down; worn outdoors
a thin layer covering something

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