crinkle root vs bittercress

crinkle root and bittercress both are nouns.

Word	Noun	Adjective	Verb	Adverb
crinkle root	Yes	No	No	No
bittercress	Yes	No	No	No

As nouns, bittercress is a hypernym of crinkle root; that is, bittercress is a word with a broader meaning than crinkle root:

crinkle root: North American herb with pungent scaly or toothed roots
bittercress: 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 crinkle root include bitter cress.

crinkle root (noun)	bittercress (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