/ Thesaurus / L Synonyms of long time Find synonyms for: Noun1. long time, age, years, time period, period of time, periodusage: a prolonged period of time; "we've known each other for ages"; "I haven't been there for years and years"Adjective1. longtime(prenominal), old (vs. new)usage: of long duration; "a longtime friend"WordNet 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