goldplate vs gold plate

goldplate is not a noun while gold plate is a noun.

Word	Noun	Adjective	Verb	Adverb
goldplate	No	No	Yes	No
gold plate	Yes	No	Yes	No

As verbs, goldplate and gold plate are synonyms defined as:

Other synonyms of goldplate include gold-plate.

goldplate (noun)	gold plate (noun)
	a thin plating of gold on something
	tableware that is plated with gold

goldplate (verb)	gold plate (verb)
plate with gold	plate with gold