/ Thesaurus / S Synonyms of state highway Find synonyms for: Noun1. expressway, freeway, motorway, pike, state highway, superhighway, throughway, thruway, highway, main roadusage: a broad highway designed for high-speed trafficWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language