gopher turtle vs tortoise

gopher turtle and tortoise both are nouns.

Word	Noun	Adjective	Verb	Adverb
gopher turtle	Yes	No	No	No
tortoise	Yes	No	No	No

As nouns, tortoise is a hypernym of gopher turtle; that is, tortoise is a word with a broader meaning than gopher turtle:

gopher turtle: burrowing edible land tortoise of southeastern North America
tortoise: usually herbivorous land turtles having clawed elephant-like limbs; worldwide in arid areas except Australia and Antarctica

gopher turtle (noun)	tortoise (noun)
burrowing edible land tortoise of southeastern North America	usually herbivorous land turtles having clawed elephant-like limbs; worldwide in arid areas except Australia and Antarctica