/ Thesaurus / T Synonyms of tomato ketchup Find synonyms for: Noun1. catsup, ketchup, cetchup, tomato ketchup, condimentusage: thick spicy sauce made from tomatoesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language