/ Thesaurus / S Synonyms of state line Find synonyms for: Noun1. state line, state boundary, boundary line, border, borderline, delimitation, meteusage: the boundary between two statesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language