plant life vs neophyte

plant life and neophyte both are nouns.

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

As nouns, neophyte is a hyponym of plant life; that is, neophyte is a word with a more specific, narrower meaning than plant life:

plant life: (botany) a living organism lacking the power of locomotion
neophyte: a plant that is found in an area where it had not been recorded previously

plant life (noun)	neophyte (noun)
(botany) a living organism lacking the power of locomotion	any new participant in some activity
	a new convert being taught the principles of Christianity by a catechist
	a plant that is found in an area where it had not been recorded previously