crinkleroot vs bitter cress

crinkleroot and bitter cress both are nouns.

Word	Noun	Adjective	Verb	Adverb
crinkleroot	Yes	No	No	No
bitter cress	Yes	No	No	No

As nouns, bitter cress is a hypernym of crinkleroot; that is, bitter cress is a word with a broader meaning than crinkleroot:

crinkleroot: North American herb with pungent scaly or toothed roots
bitter cress: any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic

Other hypernyms of crinkleroot include bittercress.

crinkleroot (noun)	bitter cress (noun)
North American herb with pungent scaly or toothed roots	any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic