field pennycress vs fanweed

field pennycress and fanweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
field pennycress	Yes	No	No	No
fanweed	Yes	No	No	No

As nouns, field pennycress and fanweed are synonyms defined as:

field pennycress and fanweed: foetid Eurasian weed having round flat pods; naturalized throughout North America

Other synonyms of field pennycress include French weed, mithridate mustard, penny grass, stinkweed, Thlaspi arvense.

field pennycress (noun)	fanweed (noun)
foetid Eurasian weed having round flat pods; naturalized throughout North America	foetid Eurasian weed having round flat pods; naturalized throughout North America