masterwort vs herbaceous plant

masterwort and herbaceous plant both are nouns.

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

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

masterwort: any plant of the genus Astrantia
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 masterwort include herb.

masterwort (noun)	herbaceous plant (noun)
any plant of the genus Astrantia	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests