Erithacus rubecola vs robin redbreast

Erithacus rubecola and robin redbreast both are nouns.

Word	Noun	Adjective	Verb	Adverb
Erithacus rubecola	Yes	No	No	No
robin redbreast	Yes	No	No	No

As nouns, Erithacus rubecola and robin redbreast are synonyms defined as:

Erithacus rubecola and robin redbreast: small Old World songbird with a reddish breast

Other synonyms of Erithacus rubecola include Old World robin, redbreast, robin.

Erithacus rubecola (noun)	robin redbreast (noun)
small Old World songbird with a reddish breast	small Old World songbird with a reddish breast