/ Thesaurus / S Synonyms of senescence Find synonyms for: Noun1. aging, ageing, senescence, organic process, biological processusage: the organic process of growing older and showing the effects of increasing age2. agedness, senescence, oldnessusage: the property characteristic of old ageWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language