botany vs pentamerous

botany is a noun but pentamerous is not a noun.

Word	Noun	Adjective	Verb	Adverb
botany	Yes	No	No	No
pentamerous	No	Yes	No	No

botany (noun)	pentamerous (noun)
the branch of biology that studies plants
all the plant life in a particular region or period

botany (adjective)	pentamerous (adjective)
	divided into five parts; specifically, having each floral whorl consist of five (or a multiple of five) members