holophyte vs plant life

holophyte and plant life both are nouns.

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

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

Other hypernyms of holophyte include flora, plant.

holophyte (noun)	plant life (noun)
an organism that produces its own food by photosynthesis	(botany) a living organism lacking the power of locomotion