sassing vs sass

sassing and sass both are nouns.

Word	Noun	Adjective	Verb	Adverb
sassing	Yes	No	No	No
sass	Yes	No	Yes	No

As nouns, sassing and sass are synonyms defined as:

Other synonyms of sassing include back talk, backtalk, lip, mouth.

sassing (noun)	sass (noun)
an impudent or insolent rejoinder	an impudent or insolent rejoinder

sassing (verb)	sass (verb)
	answer back in an impudent or insolent manner