constellation vs Great Bear

constellation and Great Bear both are nouns.

Word	Noun	Adjective	Verb	Adverb
constellation	Yes	No	No	No
Great Bear	Yes	No	No	No

constellation (noun)	Great Bear (noun)
an arrangement of parts or elements	a constellation outside the zodiac that rotates around the North Star, also known as the Great Bear or Charles' Wain
a configuration of stars as seen from the earth