Ipomoea alba vs belle de nuit

Ipomoea alba and belle de nuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ipomoea alba	Yes	No	No	No
belle de nuit	Yes	No	No	No

As nouns, Ipomoea alba and belle de nuit are synonyms defined as:

Ipomoea alba and belle de nuit: pantropical climber having white fragrant nocturnal flowers

Other synonyms of Ipomoea alba include moonflower.

Ipomoea alba (noun)	belle de nuit (noun)
pantropical climber having white fragrant nocturnal flowers	pantropical climber having white fragrant nocturnal flowers