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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language