Admiralty brass vs Muntz metal

Admiralty brass and Muntz metal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Admiralty brass	Yes	No	No	No
Muntz metal	Yes	No	No	No

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

Admiralty brass: alpha-beta brass containing tin; resistant to sea water; Admiralty Metal is a trademark
Muntz 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 brass include alpha-beta brass, yellow metal.

Admiralty brass (noun)	Muntz 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