/ Thesaurus / O Synonyms of osmunda clatonia Find synonyms for: Noun1. interrupted fern, Osmunda clatonia, flowering fern, osmundusage: North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile frondsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language