The definition of fun is something that brings pleasure, joy or playfulness.
Something that has been produced or accomplished through the effort, activity, or agency of a person or thing:
(Obs.) Something that amuses or entertains
Gaiety is defined as a state or feeling of being happy or cheerful, or it refers to entertainments, amusements or light-hearted fun.
Find another word for playfulness. In this page you can discover 20 synonyms, antonyms, idiomatic expressions, and related words for playfulness, like: frolicsomeness, friskiness, sportiveness, fun, waggishness, work, merriment, gaiety, sensuality, liveliness and spontaneity.