plant life vs being

plant life and being both are nouns.

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

As nouns, being is a hypernym of plant life; that is, being is a word with a broader meaning than plant life:

plant life: (botany) a living organism lacking the power of locomotion
being: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of plant life include organism.

plant life (noun)	being (noun)
(botany) a living organism lacking the power of locomotion	a living thing that has (or can develop) the ability to act or function independently
	the state or fact of existing