loosestrife vs herbaceous plant

loosestrife and herbaceous plant both are nouns.

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

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

loosestrife: any of various herbs and subshrubs of the genus Lysimachia
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 loosestrife include herb.

loosestrife (noun)	herbaceous plant (noun)
any of numerous herbs and subshrubs of the genus Lythrum	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
any of various herbs and subshrubs of the genus Lysimachia