insolence vs impertinence

insolence and impertinence both are nouns.

Word	Noun	Adjective	Verb	Adverb
insolence	Yes	No	No	No
impertinence	Yes	No	No	No

As nouns, insolence and impertinence are synonyms defined as:

insolence and impertinence: the trait of being rude and impertinent; inclined to take liberties

Other synonyms of insolence include cheekiness, crust, freshness, gall, impudence.

insolence (noun)	impertinence (noun)
an offensive disrespectful impudent act	inappropriate playfulness
the trait of being rude and impertinent; inclined to take liberties	the trait of being rude and impertinent; inclined to take liberties
	an impudent statement