silver-plate vs silver plate

silver-plate is not a noun while silver plate is a noun.

Word	Noun	Adjective	Verb	Adverb
silver-plate	No	No	Yes	No
silver plate	Yes	No	No	No

silver-plate (noun)	silver plate (noun)
	a thin layer of silver deposited on something
	tableware that is plated with silver

silver-plate (verb)	silver plate (verb)
plate with silver