herbal vs tisane

herbal and tisane both are nouns.

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

As nouns, tisane is a hyponym of herbal; that is, tisane is a word with a more specific, narrower meaning than herbal:

Other hyponyms of herbal include sage tea, dill tea, tea essence.

herbal (noun)	tisane (noun)
tea-like drink made of leaves of various herbs	infusion of e.g. dried or fresh flowers or leaves

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