WordNet sense 1 (verbal wit or mockery (often at another's expense but not to be taken seriously)):

play, sport

WordNet sense 2 (a disposition to find (or make) causes for amusement):

playfulness

WordNet sense 3 (providing enjoyment; pleasantly entertaining):

amusing, diverting, amusive

WordNet sense 4 (agreeably diverting or amusing):

entertaining

WordNet sense 5 (activities that are enjoyable or amusing):

merriment