heterocyclic ring vs heterocycle

heterocyclic ring and heterocycle both are nouns.

Word	Noun	Adjective	Verb	Adverb
heterocyclic ring	Yes	No	No	No
heterocycle	Yes	No	No	No

As nouns, heterocyclic ring and heterocycle are synonyms defined as:

heterocyclic ring and heterocycle: a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon

heterocyclic ring (noun)	heterocycle (noun)
a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon	a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon
	a compound containing a heterocyclic ring