good health vs radiance

good health and radiance both are nouns.

Word	Noun	Adjective	Verb	Adverb
good health	Yes	No	No	No
radiance	Yes	No	No	No

As nouns, radiance is a hyponym of good health; that is, radiance is a word with a more specific, narrower meaning than good health:

good health: the state of being vigorous and free from bodily or mental disease
radiance: an attractive combination of good health and happiness

good health (noun)	radiance (noun)
the state of being vigorous and free from bodily or mental disease	the quality of being bright and sending out rays of light
	the amount of electromagnetic radiation leaving or arriving at a point on a surface
	an attractive combination of good health and happiness