foil vs gold foil

foil and gold foil both are nouns.

Word	Noun	Adjective	Verb	Adverb
foil	Yes	No	Yes	No
gold foil	Yes	No	No	No

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

Other hyponyms of foil include aluminium foil, aluminum foil, tin foil, chaff, tin foil, tinfoil.

foil (noun)	gold foil (noun)
a light slender flexible sword tipped by a button	foil made of gold
a piece of thin and flexible sheet metal
picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through
anything that serves by contrast to call attention to another thing's good qualities

foil (verb)	gold foil (verb)
cover or back with foil
hinder or prevent (the efforts, plans, or desires) of
enhance by contrast