constellation vs Cassiopeia

constellation and Cassiopeia both are nouns.

Word	Noun	Adjective	Verb	Adverb
constellation	Yes	No	No	No
Cassiopeia	Yes	No	No	No

constellation (noun)	Cassiopeia (noun)
an arrangement of parts or elements	a W-shaped constellation in the Northern Hemisphere near Polaris
a configuration of stars as seen from the earth	(Greek mythology) the wife of Cepheus and mother of Andromeda