Breadcrumb Home > Thesaurus > R Synonyms of regicide Find synonyms for: Noun 1. regicide, killer, slayer usage: someone who commits regicide; the killer of a king 2. regicide, murder, slaying, execution usage: the act of killing a king WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of regicide (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: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language