celery root vs herbaceous plant

celery root and herbaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
celery root	Yes	No	No	No
herbaceous plant	Yes	No	No	No

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

celery root: grown for its thickened edible aromatic root
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 celery root include herb.

celery root (noun)	herbaceous plant (noun)
thickened edible aromatic root of a variety of celery plant	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
grown for its thickened edible aromatic root