Asio otus vs long-eared owl

Asio otus and long-eared owl both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asio otus	Yes	No	No	No
long-eared owl	Yes	No	No	No

As nouns, Asio otus and long-eared owl are synonyms defined as:

Asio otus and long-eared owl: slender European owl of coniferous forests with long ear tufts

Asio otus (noun)	long-eared owl (noun)
slender European owl of coniferous forests with long ear tufts	slender European owl of coniferous forests with long ear tufts