radiotelegraph vs wireless telegraph

radiotelegraph and wireless telegraph both are nouns.

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

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

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

Other synonyms of radiotelegraph include radiotelegraphy, wireless telegraphy.

radiotelegraph (noun)	wireless telegraph (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