frivolity

Nouns

(n) the trait of being frivolous; not serious or sensible frivolousness,
(n) something of little value or significance frippery, bagatelle, fluff,
(n) acting like a clown or buffoon buffoonery, clowning, harlequinade, japery, prank,

Synonyms

frivolousness frippery bagatelle fluff buffoonery clowning harlequinade japery prank

Antonyms

serious-mindedness earnestness seriousness sincerity

Words of close approximity