Amaryllis belladonna vs belladonna lily

Amaryllis belladonna and belladonna lily both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amaryllis belladonna	Yes	No	No	No
belladonna lily	Yes	No	No	No

As nouns, Amaryllis belladonna and belladonna lily are synonyms defined as:

Amaryllis belladonna and belladonna lily: amaryllis of South Africa often cultivated for its fragrant white or rose flowers

Other synonyms of Amaryllis belladonna include naked lady.

Amaryllis belladonna (noun)	belladonna lily (noun)
amaryllis of South Africa often cultivated for its fragrant white or rose flowers	amaryllis of South Africa often cultivated for its fragrant white or rose flowers