herb vs herbal

herb and herbal both are nouns.

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

herb (noun)	herbal (noun)
aromatic potherb used in cookery for its savory qualities	tea-like drink made of leaves of various herbs
a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

herb (adjective)	herbal (adjective)
	of or relating to herbs