Ursa Major vs Dipper

Ursa Major and Dipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ursa Major	Yes	No	No	No
Dipper	Yes	No	No	No

Ursa Major (noun)	Dipper (noun)
a constellation outside the zodiac that rotates around the North Star, also known as the Great Bear or Charles' Wain	a group of seven bright stars in the constellation Ursa Major
	a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris