radiotelegraphy vs radiotelegraph

radiotelegraphy and radiotelegraph both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiotelegraphy	Yes	No	No	No
radiotelegraph	Yes	No	No	No

As nouns, radiotelegraphy and radiotelegraph are synonyms defined as:

radiotelegraphy and radiotelegraph: the use of radio to send telegraphic messages (usually by Morse code)

Other synonyms of radiotelegraphy include wireless telegraph, wireless telegraphy.

As nouns, radiotelegraphy and radiotelegraph are synonyms defined as:

radiotelegraphy and radiotelegraph: telegraphy that uses transmission by radio rather than by wire

Other synonyms of radiotelegraphy include wireless telegraphy.

radiotelegraphy (noun)	radiotelegraph (noun)
the use of radio to send telegraphic messages (usually by Morse code)	the use of radio to send telegraphic messages (usually by Morse code)
telegraphy that uses transmission by radio rather than by wire	telegraphy that uses transmission by radio rather than by wire