guinea gold vs red brass

guinea gold and red brass both are nouns.

Word	Noun	Adjective	Verb	Adverb
guinea gold	Yes	No	No	No
red brass	Yes	No	No	No

As nouns, guinea gold and red brass are synonyms defined as:

guinea gold and red brass: brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry

guinea gold (noun)	red brass (noun)
brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry	brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry
22-karat gold from which guinea coins were made