barn owl vs Tyto alba

barn owl and Tyto alba both are nouns.

Word	Noun	Adjective	Verb	Adverb
barn owl	Yes	No	No	No
Tyto alba	Yes	No	No	No

As nouns, barn owl and Tyto alba are synonyms defined as:

barn owl and Tyto alba: mottled buff and white owl often inhabiting barns and other structures; important in rodent control

barn owl (noun)	Tyto alba (noun)
mottled buff and white owl often inhabiting barns and other structures; important in rodent control	mottled buff and white owl often inhabiting barns and other structures; important in rodent control