robin vs Turdus migratorius

robin and Turdus migratorius both are nouns.

Word	Noun	Adjective	Verb	Adverb
robin	Yes	No	No	No
Turdus migratorius	Yes	No	No	No

As nouns, robin and Turdus migratorius are synonyms defined as:

robin and Turdus migratorius: large American thrush having a rust-red breast and abdomen

Other synonyms of robin include American robin.

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