busy bee vs gopher

busy bee and gopher both are nouns.

Word	Noun	Adjective	Verb	Adverb
busy bee	Yes	No	No	No
gopher	Yes	No	No	No

As nouns, gopher is a hyponym of busy bee; that is, gopher is a word with a more specific, narrower meaning than busy bee:

Other hyponyms of busy bee include goffer.

busy bee (noun)	gopher (noun)
an alert and energetic person	burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America
	burrowing edible land tortoise of southeastern North America
	any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops
	a zealously energetic person (especially a salesman)