wit vs wittiness

wit and wittiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
wit	Yes	No	No	No
wittiness	Yes	No	No	No

As nouns, wit and wittiness are synonyms defined as:

wit and wittiness: a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter

Other synonyms of wit include humor, humour, witticism.

wit (noun)	wittiness (noun)
mental ability	The quality of being clever, amusingly ingenious.
a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter	a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
a witty amusing person who makes jokes