/ Thesaurus / I Synonyms of i.d. Find synonyms for: Noun1. ID, I.D., badge, positive identificationusage: a card or badge used to identify the bearer; "you had to show your ID in order to get in"Noun1. ID, I.D., badge, positive identificationusage: a state in the Rocky Mountains2. Idaho, Gem State, IDusage: (psychoanalysis) primitive instincts and energies underlying all psychic activityWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language