field mustard vs Sinapis arvensis

field mustard and Sinapis arvensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
field mustard	Yes	No	No	No
Sinapis arvensis	Yes	No	No	No

As nouns, field mustard and Sinapis arvensis are synonyms defined as:

field mustard and Sinapis arvensis: weedy Eurasian plant often a pest in grain fields

Other synonyms of field mustard include Brassica kaber, chadlock, charlock, wild mustard.

field mustard (noun)	Sinapis arvensis (noun)
weedy Eurasian plant often a pest in grain fields	weedy Eurasian plant often a pest in grain fields