field mustard vs wild mustard

field mustard and wild mustard both are nouns.

Word	Noun	Adjective	Verb	Adverb
field mustard	Yes	No	No	No
wild mustard	Yes	No	No	No

As nouns, field mustard and wild mustard are synonyms defined as:

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

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

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