jeu d'esprit vs wittiness

jeu d'esprit and wittiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
jeu d'esprit	Yes	No	No	No
wittiness	Yes	No	No	No

As nouns, wittiness is a hypernym of jeu d'esprit; that is, wittiness is a word with a broader meaning than jeu d'esprit:

jeu d'esprit: a witty comment or writing
wittiness: a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter

Other hypernyms of jeu d'esprit include humor, humour, wit, witticism.

jeu d'esprit (noun)	wittiness (noun)
a witty comment or writing	The quality of being clever, amusingly ingenious.
	a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter