Impertinence is a related term of sauciness.
As nouns the difference between impertinence and sauciness
is that impertinence
is (uncountable) lack of pertinence; irrelevance while sauciness
is the property of being saucy.
(uncountable) Lack of pertinence; irrelevance.
(countable) An instance of this; a moment of being impertinent.
(uncountable) The fact or character of being out of place; inappropriateness.
the property of being saucy
an instance of saucy behavior