impertinence vs pertness

impertinence and pertness both are nouns.

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

As nouns, impertinence and pertness are synonyms defined as:

Other synonyms of impertinence include archness, perkiness, sauciness.

impertinence (noun)	pertness (noun)
inappropriate playfulness	inappropriate playfulness
the trait of being rude and impertinent; inclined to take liberties	quality of being lively and confident
an impudent statement