horned viper vs cerastes

horned viper and cerastes both are nouns.

Word	Noun	Adjective	Verb	Adverb
horned viper	Yes	No	No	No
cerastes	Yes	No	No	No

As nouns, horned viper and cerastes are synonyms defined as:

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

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

horned viper (noun)	cerastes (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