biennial vs perennial

biennial and perennial both are nouns.

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

biennial (noun)	perennial (noun)
(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	(botany) a plant lasting for three seasons or more

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