asp viper vs viper

asp viper and viper both are nouns.

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

As nouns, viper is a hypernym of asp viper; that is, viper is a word with a broader meaning than asp viper:

asp viper: of southern Europe; similar to but smaller than the adder
viper: venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw

asp viper (noun)	viper (noun)
of southern Europe; similar to but smaller than the adder	venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw