adder vs Vipera berus

adder and Vipera berus both are nouns.

Word	Noun	Adjective	Verb	Adverb
adder	Yes	No	No	No
Vipera berus	Yes	No	No	No

As nouns, adder and Vipera berus are synonyms defined as:

adder and Vipera berus: small terrestrial viper common in northern Eurasia

Other synonyms of adder include common viper.

adder (noun)	Vipera berus (noun)
small terrestrial viper common in northern Eurasia	small terrestrial viper common in northern Eurasia
a machine that adds numbers
a person who adds numbers