coralwort vs bitter cress

coralwort and bitter cress both are nouns.

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

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

coralwort: 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 coralwort include bittercress.

coralwort (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