refulgency vs radiancy

refulgency and radiancy both are nouns.

Word	Noun	Adjective	Verb	Adverb
refulgency	Yes	No	No	No
radiancy	Yes	No	No	No

As nouns, refulgency and radiancy are synonyms defined as:

refulgency and radiancy: the quality of being bright and sending out rays of light

Other synonyms of refulgency include effulgence, radiance, refulgence, shine.

refulgency (noun)	radiancy (noun)
the quality of being bright and sending out rays of light	the quality of being bright and sending out rays of light