eaglet vs bird of Jove

eaglet and bird of Jove both are nouns.

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

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

eaglet: a young eagle
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 eaglet include eagle, young bird.

eaglet (noun)	bird of Jove (noun)
a young eagle	any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight