Synonyms for Ring Snake (same or very similar meaning)
WordNet sense 1 (harmless European snake with a bright yellow collar; common in England):
grass snake, Natrix natrix, ringed snakeWordNet sense 2 (any of numerous small nonvenomous North American snakes with a yellow or orange ring around the neck):
ringneck snake, ring-necked snakeFrom the ODE community, based on WordNetadd/edit