radiopacity vs opacity

radiopacity and opacity both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiopacity	Yes	No	No	No
opacity	Yes	No	No	No

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

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

radiopacity (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