/ Thesaurus / R Synonyms of rigor mortis Find synonyms for: Noun1. rigor mortis, physical condition, physiological state, physiological conditionusage: temporary stiffness of joints and muscular rigidity occurring after death2. rigor mortis, stiffening, rigidifying, rigidificationusage: muscular stiffening that begins 2 to 4 hours after death and lasts for about 4 daysWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language