heterocyclic vs cyclic

heterocyclic is a noun but cyclic is not a noun.

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

heterocyclic (noun)	cyclic (noun)
a compound containing a heterocyclic ring

heterocyclic (adjective)	cyclic (adjective)
containing a closed ring of atoms of which at least one is not a carbon atom	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