Breadcrumb Home > Thesaurus Cite Synonyms of hillock Find synonyms for: Noun1. knoll, mound, hillock, hummock, hammock, hillusage: a small natural hillWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: hillock (Dictionary) Related Content Daily Word Quiz: persiflage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index