Synonyms for Adder's Fern (same or very similar meaning)
WordNet sense 1 (mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia):
common polypody, sweet fern, golden polypody, golden maidenhair, Polypodium vulgare, wall fernFrom the ODE community, based on WordNetadd/edit