chives vs herb

chives and herb both are nouns.

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

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

chives (noun)	herb (noun)
cylindrical leaves used fresh as a mild onion-flavored seasoning	aromatic potherb used in cookery for its savory qualities
perennial having hollow cylindrical leaves used for seasoning	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests