Ursa Minor vs Little Dipper

Ursa Minor and Little Dipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ursa Minor	Yes	No	No	No
Little Dipper	Yes	No	No	No

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