calabar-bean vine vs Physostigma venenosum

calabar-bean vine and Physostigma venenosum both are nouns.

Word	Noun	Adjective	Verb	Adverb
calabar-bean vine	Yes	No	No	No
Physostigma venenosum	Yes	No	No	No

As nouns, calabar-bean vine and Physostigma venenosum are synonyms defined as:

calabar-bean vine and Physostigma venenosum: tropical African woody vine yielding calabar beans

calabar-bean vine (noun)	Physostigma venenosum (noun)
tropical African woody vine yielding calabar beans	tropical African woody vine yielding calabar beans