radio brightness vs intensity

radio brightness and intensity both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio brightness	Yes	No	No	No
intensity	Yes	No	No	No

As nouns, intensity is a hypernym of radio brightness; that is, intensity is a word with a broader meaning than radio brightness:

radio brightness: the strength of a radio wave picked up by a radio telescope
intensity: the amount of energy transmitted (as by acoustic or electromagnetic radiation)

Other hypernyms of radio brightness include intensity level, strength.

radio brightness (noun)	intensity (noun)
the strength of a radio wave picked up by a radio telescope	high level or degree; the property of being intense
	chromatic purity: freedom from dilution with white and hence vivid in hue
	the magnitude of sound (usually in a specified direction)
	the amount of energy transmitted (as by acoustic or electromagnetic radiation)