perennial vs flora

perennial and flora both are nouns.

Word	Noun	Adjective	Verb	Adverb
perennial	Yes	Yes	No	No
flora	Yes	No	No	No

As nouns, flora is a hypernym of perennial; that is, flora is a word with a broader meaning than perennial:

Other hypernyms of perennial include plant, plant life.

perennial (noun)	flora (noun)
(botany) a plant lasting for three seasons or more	(botany) a living organism lacking the power of locomotion
	all the plant life in a particular region or period

perennial (adjective)	flora (adjective)
lasting three seasons or more
recurring again and again
lasting an indefinitely long time; suggesting self-renewal