impertinence vs insolence

impertinence and insolence both are nouns.

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

As nouns, impertinence and insolence are synonyms defined as:

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

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

impertinence (noun)	insolence (noun)
inappropriate playfulness	an offensive disrespectful impudent act
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