/ Thesaurus / F Synonyms of first council of nicaea Find synonyms for: Noun1. Nicaea, First Council of Nicaea, ecumenical councilusage: the first ecumenical council in 325 which produced the wording of the Nicene Creed and condemned the heresy of ArianismWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language