gametophyte vs plant life

gametophyte and plant life both are nouns.

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

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

gametophyte: the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations
plant life: (botany) a living organism lacking the power of locomotion

Other hypernyms of gametophyte include flora, plant.

gametophyte (noun)	plant life (noun)
the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations	(botany) a living organism lacking the power of locomotion