periodicity vs cyclic

periodicity is a noun but cyclic is not a noun.

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

periodicity (noun)	cyclic (noun)
the quality of recurring at regular intervals

periodicity (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