radio-opacity vs opacity

radio-opacity and opacity both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio-opacity	Yes	No	No	No
opacity	Yes	No	No	No

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

radio-opacity: opacity to X-rays or other radiation
opacity: the phenomenon of not permitting the passage of electromagnetic radiation

radio-opacity (noun)	opacity (noun)
opacity to X-rays or other radiation	the quality of being opaque to a degree; the degree to which something reduces the passage of light
	incomprehensibility resulting from obscurity of meaning
	the phenomenon of not permitting the passage of electromagnetic radiation