We don't have synonyms for radiograms yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are radiogram, radiograph and radiographs.
(n) :
(telegraphy, historical) Synonym of radiotelegram (“a message, like a telegram, transmitted by wireless telegraphy (“telegraphy by radio rather than by transmission cables”)”).
(n) :
(radio, historical) Synonym of radiogramophone (“a gramophone record player that incorporates a radio receiver”).
(n) :
Synonym of radiograph (“an image, often a photographic negative, produced by radiation other than ordinary light; especially an X-ray photograph”).
(n) :
(telegraphy, historical) Synonym of radiotelegram (“a message, like a telegram, transmitted by wireless telegraphy (“telegraphy by radio rather than by transmission cables”)”).
(n) :
(radio, historical) Synonym of radiogramophone (“a gramophone record player that incorporates a radio receiver”).
(n) :
Synonym of radiograph (“an image, often a photographic negative, produced by radiation other than ordinary light; especially an X-ray photograph”).