plant life vs deaden

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

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

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

plant life (verb)	deaden (verb)
	become lifeless, less lively, intense, or active; lose life, force, or vigor
	make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation
	lessen the momentum or velocity of
	make vapid or deprive of spirit
	convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil
	make vague or obscure or make (an image) less visible
	cut a girdle around so as to kill by interrupting the circulation of water and nutrients