lobelia vs herbaceous plant

lobelia and herbaceous plant both are nouns.

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

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

lobelia: any plant or flower of the genus Lobelia
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 lobelia include herb.

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