botanical medicine vs plant life

botanical medicine and plant life both are nouns.

Word	Noun	Adjective	Verb	Adverb
botanical medicine	Yes	No	No	No
plant life	Yes	No	No	No

botanical medicine (noun)	plant life (noun)
the use of plants or plant extracts for medicinal purposes (especially plants that are not part of the normal diet)	(botany) a living organism lacking the power of locomotion