white lettuce vs Nabalus alba

white lettuce and Nabalus alba both are nouns.

Word	Noun	Adjective	Verb	Adverb
white lettuce	Yes	No	No	No
Nabalus alba	Yes	No	No	No

As nouns, white lettuce and Nabalus alba are synonyms defined as:

white lettuce and Nabalus alba: herb of northeastern North America having drooping clusters of yellowish-white flowers; sometimes placed in genus Prenanthes

Other synonyms of white lettuce include cankerweed, Prenanthes alba.

white lettuce (noun)	Nabalus alba (noun)
herb of northeastern North America having drooping clusters of yellowish-white flowers; sometimes placed in genus Prenanthes	herb of northeastern North America having drooping clusters of yellowish-white flowers; sometimes placed in genus Prenanthes