barred owl vs hooter

barred owl and hooter both are nouns.

Word	Noun	Adjective	Verb	Adverb
barred owl	Yes	No	No	No
hooter	Yes	No	No	No

As nouns, hooter is a hypernym of barred owl; that is, hooter is a word with a broader meaning than barred owl:

barred owl: large owl of eastern North America having its breast and abdomen streaked with brown
hooter: nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes

Other hypernyms of barred owl include bird of Minerva, bird of night, owl.

barred owl (noun)	hooter (noun)
large owl of eastern North America having its breast and abdomen streaked with brown	nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes
	a device on an automobile for making a warning noise
	informal terms for the nose