Nouns

(n)fun, merriment, playfulnessactivities that are enjoyable or amusing“I do it for the fun of it”, “he is fun to have around”
(n)fun, play, sportverbal wit or mockery (often at another's expense but not to be taken seriously)“he became a figure of fun”, “he said it in sport”
(n)funviolent and excited activity“she asked for money and then the fun began”
(n)playfulness, funa disposition to find (or make) causes for amusement“her playfulness surprised me”, “he was fun to be with”