aggressiveness vs brass

aggressiveness and brass both are nouns.

Word	Noun	Adjective	Verb	Adverb
aggressiveness	Yes	No	No	No
brass	Yes	No	No	No

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

aggressiveness (noun)	brass (noun)
the quality of being bold and enterprising	a wind instrument that consists of a brass tube (usually of variable length) that is blown by means of a cup-shaped or funnel-shaped mouthpiece
a natural disposition to be hostile	a memorial made of brass
a feeling of hostility that arouses thoughts of attack	an ornament or utensil made of brass
	impudent aggressiveness
	the persons (or committees or departments etc.) who make up a body for the purpose of administering something
	the section of a band or orchestra that plays brass instruments
	an alloy of copper and zinc