crab cactus vs Thanksgiving cactus

crab cactus and Thanksgiving cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
crab cactus	Yes	No	No	No
Thanksgiving cactus	Yes	No	No	No

As nouns, crab cactus and Thanksgiving cactus are synonyms defined as:

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

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

crab cactus (noun)	Thanksgiving 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