polestar vs Little Dipper

polestar and Little Dipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
polestar	Yes	No	No	No
Little Dipper	Yes	No	No	No

polestar (noun)	Little Dipper (noun)
the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it	a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris