pica-pica vs herbaceous plant

pica-pica and herbaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
pica-pica	Yes	No	No	No
herbaceous plant	Yes	No	No	No

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

pica-pica: a stinging herb of tropical America
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 pica-pica include herb.

pica-pica (noun)	herbaceous plant (noun)
a stinging herb of tropical America	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests