white lily vs Nymphaea lotus

white lily and Nymphaea lotus both are nouns.

Word	Noun	Adjective	Verb	Adverb
white lily	Yes	No	No	No
Nymphaea lotus	Yes	No	No	No

As nouns, white lily and Nymphaea lotus are synonyms defined as:

white lily and Nymphaea lotus: white Egyptian lotus: water lily of Egypt to southeastern Africa; held sacred by the Egyptians

Other synonyms of white lily include Egyptian water lily, lotus, white lotus.

white lily (noun)	Nymphaea lotus (noun)
lily of eastern Mediterranean and the Balkans with broad funnel-shaped white flowers	white Egyptian lotus: water lily of Egypt to southeastern Africa; held sacred by the Egyptians
white Egyptian lotus: water lily of Egypt to southeastern Africa; held sacred by the Egyptians