frivolity
[noun]
Synonyms: fun, flippancy, frivolousness, gaiety, levity, light-heartedness, silliness, superficiality, triviality

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Antonyms: seriousness, staidness
Related Words: coquetting, dallying, flirting, toying, trifling, fun, game, jest, play, sport

[TahlilGaran] English Synonym Dictionary ▲

fri‧vol‧i‧ty /frɪˈvɒləti, frɪˈvɒlɪti $ -ˈvɑː-/ noun (plural frivolities)

1. [uncountable and countable] behaviour or activities that are not serious or sensible, especially when you should be serious or sensible:
I don’t think such frivolity helps the organization’s public image.

2. [countable] something that is silly and unimportant:
Try not to be distracted by the frivolities of the world.

[TahlilGaran] Dictionary of Contemporary English ▲