white mustard vs Sinapis alba

white mustard and Sinapis alba both are nouns.

Word	Noun	Adjective	Verb	Adverb
white mustard	Yes	No	No	No
Sinapis alba	Yes	No	No	No

As nouns, white mustard and Sinapis alba are synonyms defined as:

white mustard and Sinapis alba: Eurasian mustard cultivated for its pungent seeds; a source of table mustard and mustard oil

Other synonyms of white mustard include Brassica hirta.

white mustard (noun)	Sinapis alba (noun)
Eurasian mustard cultivated for its pungent seeds; a source of table mustard and mustard oil	Eurasian mustard cultivated for its pungent seeds; a source of table mustard and mustard oil