trefoil vs herbaceous plant

trefoil and herbaceous plant both are nouns.

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

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

trefoil: a plant of the genus Trifolium
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 trefoil include herb.

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

trefoil: any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves
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 trefoil include herb.

trefoil (noun)	herbaceous plant (noun)
an architectural ornament in the form of three arcs arranged in a circle	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
a plant of the genus Trifolium
any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves