/ Thesaurus / S Synonyms of sea mile Find synonyms for: Noun1. sea mile, mile, nautical linear unitusage: a former British unit of length once used in navigation; equivalent to 6,000 feet (1828.8 meters)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language