robin vs Erithacus rubecola

robin and Erithacus rubecola both are nouns.

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

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

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

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

robin (noun)	Erithacus rubecola (noun)
large American thrush having a rust-red breast and abdomen	small Old World songbird with a reddish breast
small Old World songbird with a reddish breast