tarweed vs herb

tarweed and herb both are nouns.

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

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

tarweed: any of various resinous glandular plants of the genus Madia; of western North and South America
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 tarweed include herbaceous plant.

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

tarweed: any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock
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 tarweed include herbaceous plant.

tarweed (noun)	herb (noun)
any of various resinous glandular plants of the genus Madia; of western North and South America	aromatic potherb used in cookery for its savory qualities
any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests