/ Thesaurus / W Synonyms of william clark Find synonyms for: Noun1. Clark, William Clarkusage: United States explorer who (with Meriwether Lewis) led an expedition from St. Louis to the mouth of the Columbia River; Clark was responsible for making maps of the area (1770-1838)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language