/ Thesaurus / S Synonyms of st. john river Find synonyms for: Noun1. Saint John, Saint John River, St. John, St. John Riverusage: a river that rises in Maine and flows northeastward through New Brunswick to empty into the Bay of FundyWordNet 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