sneezeweed vs herbaceous plant

sneezeweed and herbaceous plant both are nouns.

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

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

sneezeweed: any of various plants of the genus Helenium characteristically causing sneezing
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 sneezeweed include herb.

sneezeweed (noun)	herbaceous plant (noun)
any of various plants of the genus Helenium characteristically causing sneezing	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests