/ Thesaurus / H Synonyms of high sea Find synonyms for: Noun1. high sea, international waters, body of water, waterusage: the open seas of the world outside the territorial waters of any nationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language