flora vs plant life

flora and plant life both are nouns.

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

As nouns, flora and plant life are synonyms defined as:

flora and plant life: (botany) a living organism lacking the power of locomotion

Other synonyms of flora include plant.

flora (noun)	plant life (noun)
(botany) a living organism lacking the power of locomotion	(botany) a living organism lacking the power of locomotion
all the plant life in a particular region or period