Vipera berus vs adder

Vipera berus and adder both are nouns.

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

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

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

Other synonyms of Vipera berus include common viper.

Vipera berus (noun)	adder (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