/ Thesaurus / O Synonyms of one year old Find synonyms for: Adjective1. one-year-old, young (vs. old), immatureusage: one year of ageWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language