Admiralty Metal vs yellow metal

Admiralty Metal and yellow metal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Admiralty Metal	Yes	No	No	No
yellow metal	Yes	No	No	No

As nouns, yellow metal is a hypernym of Admiralty Metal; that is, yellow metal is a word with a broader meaning than Admiralty Metal:

Admiralty Metal: alpha-beta brass containing tin; resistant to sea water; Admiralty Metal is a trademark
yellow metal: a brass that has more zinc and is stronger than alpha brass; used in making castings and hot-worked products

Other hypernyms of Admiralty Metal include alpha-beta brass, Muntz metal.

Admiralty Metal (noun)	yellow metal (noun)
alpha-beta brass containing tin; resistant to sea water; Admiralty Metal is a trademark	a brass that has more zinc and is stronger than alpha brass; used in making castings and hot-worked products