Zygocactus truncatus vs crab cactus

Zygocactus truncatus and crab cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zygocactus truncatus	Yes	No	No	No
crab cactus	Yes	No	No	No

As nouns, Zygocactus truncatus and crab cactus are synonyms defined as:

Zygocactus truncatus and crab cactus: South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera

Other synonyms of Zygocactus truncatus include Schlumbergera truncatus, Thanksgiving cactus.

Zygocactus truncatus (noun)	crab cactus (noun)
South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera	South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera