hogweed vs herbaceous plant

hogweed and herbaceous plant both are nouns.

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

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

hogweed: tall coarse plant having thick stems and cluster of white to purple flowers
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 hogweed include herb.

hogweed (noun)	herbaceous plant (noun)
tall coarse plant having thick stems and cluster of white to purple flowers	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests