chervil vs herb

chervil and herb both are nouns.

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

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

chervil: fresh ferny parsley-like leaves used as a garnish with chicken and veal and omelets and green salads and spinach
herb: aromatic potherb used in cookery for its savory qualities

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

chervil: aromatic annual Old World herb cultivated for its finely divided and often curly leaves for use especially in soups and salads
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 chervil include herbaceous plant.

chervil (noun)	herb (noun)
fresh ferny parsley-like leaves used as a garnish with chicken and veal and omelets and green salads and spinach	aromatic potherb used in cookery for its savory qualities
aromatic annual Old World herb cultivated for its finely divided and often curly leaves for use especially in soups and salads	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests