perennial vs biennial

perennial and biennial both are nouns.

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

perennial (noun)	biennial (noun)
(botany) a plant lasting for three seasons or more	(botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season

perennial (adjective)	biennial (adjective)
lasting three seasons or more	having a life cycle lasting two seasons
recurring again and again	occurring every second year
lasting an indefinitely long time; suggesting self-renewal