blueweed vs herbaceous plant

blueweed and herbaceous plant both are nouns.

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

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

blueweed: a coarse prickly European weed with spikes of blue flowers; naturalized in United States
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 blueweed include herb.

blueweed (noun)	herbaceous plant (noun)
a coarse prickly European weed with spikes of blue flowers; naturalized in United States	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests