wireless telegraph vs radiotelegraphy

wireless telegraph and radiotelegraphy both are nouns.

Word	Noun	Adjective	Verb	Adverb
wireless telegraph	Yes	No	No	No
radiotelegraphy	Yes	No	No	No

As nouns, wireless telegraph and radiotelegraphy are synonyms defined as:

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

Other synonyms of wireless telegraph include radiotelegraph, wireless telegraphy.

wireless telegraph (noun)	radiotelegraphy (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