/ Thesaurus / H Synonyms of henceforward Find synonyms for: Adverb1. henceforth, henceforwardusage: from this time forth; from now on; "henceforth she will be known as Mrs. Smith"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language