brass vs audacity

brass and audacity both are nouns.

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

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

Other hyponyms of brass include audaciousness.

brass (noun)	audacity (noun)
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	fearless daring
a memorial made of brass	aggressive boldness or unmitigated effrontery
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