WordNet sense 1 (a characteristic (habitual or relatively temporary) state of feeling):

mood, temper, humour

WordNet sense 2 (a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter):

wit, witticism, wittiness

WordNet sense 3 (the liquid parts of the body):

liquid body substance, bodily fluid, body fluid

WordNet sense 4 (the trait of appreciating (and being able to express) the humorous):

sense of humor, sense of humour