/ Thesaurus / P Synonyms of percival lowell Find synonyms for: Noun1. Lowell, Percival Lowellusage: United States astronomer whose studies of Mars led him to conclude that Mars was inhabited (1855-1916)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language