nobility vs peerage

nobility and peerage both are nouns.

Word	Noun	Adjective	Verb	Adverb
nobility	Yes	No	No	No
peerage	Yes	No	No	No

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

Other hyponyms of nobility include noblesse, baronage, baronetage, knighthood, samurai.

nobility (noun)	peerage (noun)
the quality of elevation of mind and exaltation of character or ideals or conduct	the peers of a kingdom considered as a group
a privileged class holding hereditary titles
the state of being of noble birth