phytology vs cyclic

phytology is a noun but cyclic is not a noun.

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

phytology (noun)	cyclic (noun)
the branch of biology that studies plants

phytology (adjective)	cyclic (adjective)
	recurring in cycles
	of a compound having atoms arranged in a ring structure
	forming a whorl or having parts arranged in a whorl
	conforming to the Carnot cycle
	marked by repeated cycles