cupflower vs nierembergia

cupflower and nierembergia both are nouns.

Word	Noun	Adjective	Verb	Adverb
cupflower	Yes	No	No	No
nierembergia	Yes	No	No	No

As nouns, cupflower and nierembergia are synonyms defined as:

cupflower and nierembergia: any of various plants of the genus Nierembergia having upturned bell-shaped flowers

cupflower (noun)	nierembergia (noun)
any of various plants of the genus Nierembergia having upturned bell-shaped flowers	any of various plants of the genus Nierembergia having upturned bell-shaped flowers
Mexican evergreen climbing plant having large solitary funnel-shaped fragrant yellow flowers with purple-brown ridges in the throat