Great Bear vs constellation

Great Bear and constellation both are nouns.

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

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