plant life vs saprophytic

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

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

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

plant life (adjective)	saprophytic (adjective)
	obtaining food osmotically from dissolved organic material
	(of some plants or fungi) feeding on dead or decaying organic matter