harpy vs bird of Jove

harpy and bird of Jove both are nouns.

Word	Noun	Adjective	Verb	Adverb
harpy	Yes	No	No	No
bird of Jove	Yes	No	No	No

As nouns, bird of Jove is a hypernym of harpy; that is, bird of Jove is a word with a broader meaning than harpy:

harpy: large black-and-white crested eagle of tropical America
bird of Jove: any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight

Other hypernyms of harpy include eagle.

harpy (noun)	bird of Jove (noun)
large black-and-white crested eagle of tropical America	any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight
any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes
a malicious woman with a fierce temper