false pimpernel vs chaffweed

false pimpernel and chaffweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
false pimpernel	Yes	No	No	No
chaffweed	Yes	No	No	No

As nouns, false pimpernel and chaffweed are synonyms defined as:

false pimpernel and chaffweed: weedy plant having short dry chafflike leaves

Other synonyms of false pimpernel include bastard pimpernel.

false pimpernel (noun)	chaffweed (noun)
weedy plant having short dry chafflike leaves	weedy plant having short dry chafflike leaves