plant life vs carnivorous

plant life is a noun but carnivorous is not a noun.

Word	Noun	Adjective	Verb	Adverb
plant life	Yes	No	No	No
carnivorous	No	Yes	No	No

plant life (noun)	carnivorous (noun)
(botany) a living organism lacking the power of locomotion

plant life (adjective)	carnivorous (adjective)
	(used of plants as well as animals) feeding on animals
	relating to or characteristic of carnivores