/ Thesaurus / O Synonyms of oak fern Find synonyms for: Noun1. oak fern, Gymnocarpium dryopteris, Thelypteris dryopteris, fernusage: bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphereWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language