/ Thesaurus / F Synonyms of frederick william iv Find synonyms for: Noun1. Frederick William IVusage: king of Prussia who violently suppressed democratic movements (1795-1865)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language