wilde dagga vs herb

wilde dagga and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
wilde dagga	Yes	No	No	No
herb	Yes	No	No	No

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

wilde dagga: relatively nontoxic South African herb smoked like tobacco
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 wilde dagga include herbaceous plant.

wilde dagga (noun)	herb (noun)
relatively nontoxic South African herb smoked like tobacco	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