plating vs metal plating

plating and metal plating both are nouns.

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

As nouns, plating and metal plating are synonyms defined as:

plating and metal plating: a thin coating of metal deposited on a surface

plating (noun)	metal plating (noun)
the application of a thin coat of metal (as by electrolysis)	a thin coating of metal deposited on a surface
a thin coating of metal deposited on a surface