radiography vs skiagraphy

radiography and skiagraphy both are nouns.

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

As nouns, radiography and skiagraphy are synonyms defined as:

radiography and skiagraphy: the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light

radiography (noun)	skiagraphy (noun)
photography that uses other kinds of radiation than visible light	the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light
the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light