/ Thesaurus / S Synonyms of suspiciousness Find synonyms for: Noun1. suspicion, suspiciousness, distrust, distrustfulness, mistrustusage: being of a suspicious nature; "his suspiciousness destroyed his marriage"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language