pepper root vs Cardamine diphylla

pepper root and Cardamine diphylla both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepper root	Yes	No	No	No
Cardamine diphylla	Yes	No	No	No

As nouns, pepper root and Cardamine diphylla are synonyms defined as:

pepper root and Cardamine diphylla: North American herb with pungent scaly or toothed roots

Other synonyms of pepper root include crinkle-root, crinkle root, crinkleroot, Dentaria diphylla, toothwort.

pepper root (noun)	Cardamine diphylla (noun)
North American herb with pungent scaly or toothed roots	North American herb with pungent scaly or toothed roots