eastern chipmunk vs squirrel

eastern chipmunk and squirrel both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern chipmunk	Yes	No	No	No
squirrel	Yes	No	No	No

As nouns, squirrel is a hypernym of eastern chipmunk; that is, squirrel is a word with a broader meaning than eastern chipmunk:

eastern chipmunk: small striped semiterrestrial eastern American squirrel with cheek pouches
squirrel: a kind of arboreal rodent having a long bushy tail

eastern chipmunk (noun)	squirrel (noun)
small striped semiterrestrial eastern American squirrel with cheek pouches	a kind of arboreal rodent having a long bushy tail
	the fur of a squirrel