horned asp vs sand viper

horned asp and sand viper both are nouns.

Word	Noun	Adjective	Verb	Adverb
horned asp	Yes	No	No	No
sand viper	Yes	No	No	No

As nouns, horned asp and sand viper are synonyms defined as:

horned asp and sand viper: highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye

Other synonyms of horned asp include cerastes, Cerastes cornutus, horned viper.

horned asp (noun)	sand viper (noun)
highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye	highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye
	harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed