Erithacus rubecola vs redbreast

Erithacus rubecola and redbreast both are nouns.

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

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

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

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

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