/ Thesaurus / N Synonyms of north sea Find synonyms for: Noun1. North Seausage: an arm of the North Atlantic between the British Isles and Scandinavia; oil was discovered under the North Sea in 1970WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language