/ Thesaurus / H Synonyms of hilliness Find synonyms for: Noun1. hilliness, ruggednessusage: the quality of being hilly; "the hilliness of West Virginia"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language