radiograph vs radiogram

radiograph and radiogram both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiograph	Yes	No	No	No
radiogram	Yes	No	No	No

As nouns, radiograph and radiogram are synonyms defined as:

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

Other synonyms of radiograph include shadowgraph, skiagram, skiagraph.

radiograph (noun)	radiogram (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)
	a message transmitted by wireless telegraphy