Breadcrumb Home > Thesaurus Cite Synonyms of iq Find synonyms for: Noun1. intelligence quotient, IQ, I.Q., ratiousage: a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: iq (Dictionary) Related Content Daily Word Quiz: apotheosis Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index