/ Thesaurus / S Synonyms of squall line Find synonyms for: Noun1. squall line, cold front, polar frontusage: a cold front along which squalls or thunderstorms are likelyWordNet 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