gleam vs radiance

gleam and radiance both are nouns.

Word	Noun	Adjective	Verb	Adverb
gleam	Yes	No	Yes	No
radiance	Yes	No	No	No

As nouns, radiance is a hypernym of gleam; that is, radiance is a word with a broader meaning than gleam:

Other hypernyms of gleam include effulgence, radiancy, refulgence, refulgency, shine.

gleam (noun)	radiance (noun)
an appearance of reflected light	the quality of being bright and sending out rays of light
a flash of light (especially reflected light)	the amount of electromagnetic radiation leaving or arriving at a point on a surface
	an attractive combination of good health and happiness

gleam (verb)	radiance (verb)
to shine with faint or brief light
shine brightly, like a star or a light
be shiny, as if wet