refulgency vs effulgence

refulgency and effulgence both are nouns.

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

As nouns, refulgency and effulgence are synonyms defined as:

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

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

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