Little Dipper vs Dipper

Little Dipper and Dipper both are nouns.

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

As nouns, Little Dipper and Dipper are synonyms defined as:

Little Dipper and Dipper: a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris

Little Dipper (noun)	Dipper (noun)
a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris	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