radio vs radio set

radio and radio set both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio	Yes	Yes	Yes	No
radio set	Yes	No	No	No

As nouns, radio and radio set are synonyms defined as:

radio and radio set: an electronic receiver that detects and demodulates and amplifies transmitted signals

Other synonyms of radio include radio receiver, receiving set, tuner, wireless.

radio (noun)	radio set (noun)
a communication system based on broadcasting electromagnetic waves	an electronic receiver that detects and demodulates and amplifies transmitted signals
an electronic receiver that detects and demodulates and amplifies transmitted signals
medium for communication

radio (adjective)	radio set (adjective)
indicating radiation or radioactivity

radio (verb)	radio set (verb)
transmit messages via radio waves