flowering tobacco vs Nicotiana alata

flowering tobacco and Nicotiana alata both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowering tobacco	Yes	No	No	No
Nicotiana alata	Yes	No	No	No

As nouns, flowering tobacco and Nicotiana alata are synonyms defined as:

flowering tobacco and Nicotiana alata: South American ornamental perennial having nocturnally fragrant greenish-white flowers

Other synonyms of flowering tobacco include Jasmine tobacco.

flowering tobacco (noun)	Nicotiana alata (noun)
South American ornamental perennial having nocturnally fragrant greenish-white flowers	South American ornamental perennial having nocturnally fragrant greenish-white flowers