Sagittarius vs bird genus

Sagittarius and bird genus both are nouns.

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

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

Sagittarius (noun)	bird genus (noun)
type genus of the Sagittariidae	a genus of birds
the ninth sign of the zodiac; the sun is in this sign from about November 22 to December 21
a large zodiacal constellation in the Southern Hemisphere; between Scorpius and Capricornus
(astrology) a person who is born while the sun is in Sagittarius