radiotelephone vs radiotelephonic

radiotelephone is a noun but radiotelephonic is not a noun.

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

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

radiotelephone (adjective)	radiotelephonic (adjective)
	relating to or by means of radiotelephony