Breadcrumb Home > Thesaurus > O Synonyms of obsolescence Find synonyms for: Noun 1. obsolescence, degeneration, devolution usage: the process of becoming obsolete; falling into disuse or becoming out of date; "a policy of planned obsolescence" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of obsolescence (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language