constellation vs Coma Berenices

constellation and Coma Berenices both are nouns.

Word	Noun	Adjective	Verb	Adverb
constellation	Yes	No	No	No
Coma Berenices	Yes	No	No	No

constellation (noun)	Coma Berenices (noun)
an arrangement of parts or elements	a constellation in the Northern Hemisphere between Ursa Major and Bootes; contains a cluster of some 10,000 galaxies
a configuration of stars as seen from the earth