night-blooming cereus vs cactus

night-blooming cereus and cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
night-blooming cereus	Yes	No	No	No
cactus	Yes	No	No	No

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

night-blooming cereus: any of several night-blooming cacti of the genus Selenicereus
cactus: any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines

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

night-blooming cereus: any of several cacti of the genus Cereus
cactus: any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines

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

night-blooming cereus: any of several cacti of the genus Hylocereus
cactus: any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines

night-blooming cereus (noun)	cactus (noun)
any of several night-blooming cacti of the genus Selenicereus	any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines
any of several cacti of the genus Cereus
any of several cacti of the genus Hylocereus