puff adder vs Bitis arietans

puff adder and Bitis arietans both are nouns.

Word	Noun	Adjective	Verb	Adverb
puff adder	Yes	No	No	No
Bitis arietans	Yes	No	No	No

As nouns, puff adder and Bitis arietans are synonyms defined as:

puff adder and Bitis arietans: large African viper that inflates its body when alarmed

puff adder (noun)	Bitis arietans (noun)
large African viper that inflates its body when alarmed	large African viper that inflates its body when alarmed
harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed