Breadcrumb Home > Thesaurus > S Synonyms of steepen Find synonyms for: Verb 1. steepen, change usage: become steeper; "The mountain side has steepened" 2. steepen, change, alter, modify usage: make steeper; "The landslides have steepened the mountain sides" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of steepen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: limpid Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language