coralroot vs bitter cress

coralroot and bitter cress both are nouns.

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

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

coralroot: European bittercress having a knotted white rootstock
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 coralroot include bittercress.

coralroot (noun)	bitter cress (noun)
European bittercress having a knotted white rootstock	any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic