Upupa epops vs hoopoo

Upupa epops and hoopoo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Upupa epops	Yes	No	No	No
hoopoo	Yes	No	No	No

As nouns, hoopoo is a hypernym of Upupa epops; that is, hoopoo is a word with a broader meaning than Upupa epops:

Upupa epops: pinkish-brown hoopoe with black-and-white wings
hoopoo: any of several crested Old World birds with a slender downward-curved bill

Other hypernyms of Upupa epops include hoopoe.

Upupa epops (noun)	hoopoo (noun)
pinkish-brown hoopoe with black-and-white wings	any of several crested Old World birds with a slender downward-curved bill