stickweed vs herb

stickweed and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
stickweed	Yes	No	No	No
herb	Yes	No	No	No

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

stickweed: any of several herbaceous plants having seeds that cling to clothing
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 stickweed include herbaceous plant.

stickweed (noun)	herb (noun)
any of several herbaceous plants having seeds that cling to clothing	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