Phaethon vs bird genus

Phaethon and bird genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phaethon	Yes	No	No	No
bird genus	Yes	No	No	No

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

Phaethon (noun)	bird genus (noun)
type genus of the Phaethontidae	a genus of birds
(Greek mythology) son of Helios; killed when trying to drive his father's chariot and came too close to earth