Breadcrumb Home > Thesaurus > Z Synonyms of zarathustra Find synonyms for: Noun 1. Zoroaster, Zarathustra usage: Persian prophet who founded Zoroastrianism (circa 628-551 BC) WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of zarathustra (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: censure Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language