wittiness vs witticism

wittiness and witticism both are nouns.

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

As nouns, wittiness and witticism are synonyms defined as:

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

Other synonyms of wittiness include humor, humour, wit.

wittiness (noun)	witticism (noun)
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