wit

(noun) a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter. Synonyms: humor, humour, witticism, wittiness.

(noun) mental ability. Synonyms: brain, brainpower, learning ability, mental capacity, mentality. Example: "He's got plenty of brains but no common sense."

(noun) a witty amusing person who makes jokes. Synonyms: wag, card.