naturalize vs plant life

naturalize is not a noun while plant life is a noun.

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

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

naturalize (verb)	plant life (verb)
make into a citizen
make more natural or lifelike
adopt to another place
adapt (a wild plant or unclaimed land) to the environment
explain with reference to nature