hedgehog cereus vs cactus

hedgehog cereus and cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
hedgehog cereus	Yes	No	No	No
cactus	Yes	No	No	No

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

hedgehog cereus: cactus of the genus Echinocereus
cactus: any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines

hedgehog cereus (noun)	cactus (noun)
cactus of the genus Echinocereus	any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines