phytology vs perennial

phytology and perennial both are nouns.

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

phytology (noun)	perennial (noun)
the branch of biology that studies plants	(botany) a plant lasting for three seasons or more

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