Open English Wordnet
Nouns
(n)horned viper, cerastes, sand viper, horned asp, Cerastes cornutushighly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye
(n)hognose snake, puff adder, sand viperharmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed