garambulla cactus vs cactus

garambulla cactus and cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
garambulla cactus	Yes	No	No	No
cactus	Yes	No	No	No

As nouns, cactus is a hypernym of garambulla cactus; that is, cactus is a word with a broader meaning than garambulla cactus:

garambulla cactus: arborescent cactus of western Mexico bearing a small oblong edible berrylike fruit
cactus: any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines

garambulla cactus (noun)	cactus (noun)
arborescent cactus of western Mexico bearing a small oblong edible berrylike fruit	any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines