stonecress vs herbaceous plant

stonecress and herbaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
stonecress	Yes	No	No	No
herbaceous plant	Yes	No	No	No

As nouns, herbaceous plant is a hypernym of stonecress; that is, herbaceous plant is a word with a broader meaning than stonecress:

stonecress: any Old World herb of the genus Aethionema; native of sunny limestone habitats
herbaceous plant: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of stonecress include herb.

stonecress (noun)	herbaceous plant (noun)
any Old World herb of the genus Aethionema; native of sunny limestone habitats	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests