Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun silliness

2 senses of silliness

Sense 1
absurdity, fatuity, fatuousness, silliness -- (a ludicrous folly; "the crowd laughed at the absurdity of the clown's behavior")
       => folly, foolishness, unwiseness -- (the trait of acting stupidly or rashly)

Sense 2
giddiness, silliness -- (an impulsive scatterbrained manner)
       => frivolity, frivolousness -- (the trait of being frivolous; not serious or sensible)