sawwort vs herbaceous plant

sawwort and herbaceous plant both are nouns.

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

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

sawwort: European perennial whose serrate leaves yield a yellow dye
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 sawwort include herb.

sawwort (noun)	herbaceous plant (noun)
European perennial whose serrate leaves yield a yellow dye	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests