radiotelephone vs radiophone

radiotelephone and radiophone both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiotelephone	Yes	No	No	No
radiophone	Yes	No	No	No

As nouns, radiotelephone and radiophone are synonyms defined as:

radiotelephone and radiophone: a telephone that communicates by radio waves rather than along cables

Other synonyms of radiotelephone include wireless telephone.

radiotelephone (noun)	radiophone (noun)
a telephone that communicates by radio waves rather than along cables	a telephone that communicates by radio waves rather than along cables
telephony that uses transmission by radio rather than by wire