shadowgraph vs skiagraph

shadowgraph and skiagraph both are nouns.

Word	Noun	Adjective	Verb	Adverb
shadowgraph	Yes	No	No	No
skiagraph	Yes	No	No	No

As nouns, shadowgraph and skiagraph are synonyms defined as:

shadowgraph and skiagraph: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

Other synonyms of shadowgraph include radiogram, radiograph, skiagram.

shadowgraph (noun)	skiagraph (noun)
a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)	a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)