/ Thesaurus / S Synonyms of st. johns river Find synonyms for: Noun1. Saint Johns, Saint Johns River, St. Johns, St. Johns Riverusage: a river in northeastern Florida that flows northward to Jacksonville and then eastward to empty into the Atlantic OceanNoun1. Saint Johns, Saint Johns River, St. Johns, St. Johns 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: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language