/ Thesaurus / M Synonyms of mark of cain Find synonyms for: Noun1. mark of Cain, sin, sinfulness, wickednessusage: the mark that God set upon Cain now refers to a person's sinful natureWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language