boys-and-girls vs herb mercury

boys-and-girls and herb mercury both are nouns.

Word	Noun	Adjective	Verb	Adverb
boys-and-girls	Yes	No	No	No
herb mercury	Yes	No	No	No

As nouns, boys-and-girls and herb mercury are synonyms defined as:

boys-and-girls and herb mercury: Eurafrican annual naturalized in America as a weed; formerly dried for use as a purgative, diuretic or antisyphilitic

Other synonyms of boys-and-girls include herbs mercury, Mercurialis annua.

boys-and-girls (noun)	herb mercury (noun)
Eurafrican annual naturalized in America as a weed; formerly dried for use as a purgative, diuretic or antisyphilitic	Eurafrican annual naturalized in America as a weed; formerly dried for use as a purgative, diuretic or antisyphilitic