autoradiography vs skiagraphy

autoradiography and skiagraphy both are nouns.

Word	Noun	Adjective	Verb	Adverb
autoradiography	Yes	No	No	No
skiagraphy	Yes	No	No	No

As nouns, skiagraphy is a hypernym of autoradiography; that is, skiagraphy is a word with a broader meaning than autoradiography:

autoradiography: producing a radiograph by means of the radiation emitted from the specimen being photographed
skiagraphy: the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light

Other hypernyms of autoradiography include radiography.

autoradiography (noun)	skiagraphy (noun)
producing a radiograph by means of the radiation emitted from the specimen being photographed	the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light