/ Thesaurus / C Synonyms of cat o' nine tails Find synonyms for: Noun1. cat-o'-nine-tails, cat, whipusage: a whip with nine knotted cords; "British sailors feared the cat"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language