/ Thesaurus / C Synonyms of calc tufa Find synonyms for: Noun1. tufa, calc-tufa, rock, stoneusage: a soft porous rock consisting of calcium carbonate deposited from springs rich in limeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language