Parochetus communis vs herb

Parochetus communis and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Parochetus communis	Yes	No	No	No
herb	Yes	No	No	No

As nouns, herb is a hypernym of Parochetus communis; that is, herb is a word with a broader meaning than Parochetus communis:

Parochetus communis: trailing trifoliate Asiatic and African herb having cobalt blue flowers
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of Parochetus communis include herbaceous plant.

Parochetus communis (noun)	herb (noun)
trailing trifoliate Asiatic and African herb having cobalt blue flowers	aromatic potherb used in cookery for its savory qualities
	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests