/ Thesaurus / S Synonyms of sword fern Find synonyms for: Noun1. sword fern, fernusage: any of several tropical ferns having more or less sword-shaped fronds including one from which the Boston fern developedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language