Breadcrumb Home > Thesaurus > E Synonyms of estrus Find synonyms for: Noun 1. estrus, oestrus, heat, rut, physical condition, physiological state, physiological condition usage: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of estrus (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: meretricious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language