/ Thesaurus / F Synonyms of frivolousness Find synonyms for: Noun1. frivolity, frivolousness, traitusage: the trait of being frivolous; not serious or sensibleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language