Synonyms for Bracken (same or very similar meaning)
WordNet sense 1 (fern of southeastern Asia; not hardy in cold temperate regions):
Pteridium esculentumWordNet sense 2 (large coarse fern often several feet high; essentially weed ferns; cosmopolitan):
brake, pasture brake, Pteridium aquilinumFrom the ODE community, based on WordNetadd/edit