impudence vs hutzpah

impudence and hutzpah both are nouns.

Word	Noun	Adjective	Verb	Adverb
impudence	Yes	No	No	No
hutzpah	Yes	No	No	No

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

impudence: the trait of being rude and impertinent; inclined to take liberties
hutzpah: (Yiddish) unbelievable gall; insolence; audacity

Other hyponyms of impudence include chutzpa, chutzpah.

impudence (noun)	hutzpah (noun)
the trait of being rude and impertinent; inclined to take liberties	(Yiddish) unbelievable gall; insolence; audacity
an impudent statement