charlock vs chadlock

charlock and chadlock both are nouns.

Word	Noun	Adjective	Verb	Adverb
charlock	Yes	No	No	No
chadlock	Yes	No	No	No

As nouns, charlock and chadlock are synonyms defined as:

charlock and chadlock: weedy Eurasian plant often a pest in grain fields

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

charlock (noun)	chadlock (noun)
weedy Eurasian plant often a pest in grain fields	weedy Eurasian plant often a pest in grain fields