origanum vs herbaceous plant

origanum and herbaceous plant both are nouns.

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

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

origanum: any of various fragrant aromatic herbs of the genus Origanum used as seasonings
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 origanum include herb.

origanum (noun)	herbaceous plant (noun)
any of various fragrant aromatic herbs of the genus Origanum used as seasonings	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests