/ Thesaurus / F Synonyms of fifties Find synonyms for: Noun1. fifties, 1950s, decade, decennary, decenniumusage: the decade from 1950 to 19592. fifties, mid-fifties, time of lifeusage: the time of life between 50 and 60Noun1. fifties, 1950s, decade, decennary, decenniumusage: the cardinal number that is the product of ten and five2. fifties, mid-fifties, time of lifeusage: a United States bill worth 50 dollarsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language