clock radio vs receiving set

clock radio and receiving set both are nouns.

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

As nouns, receiving set is a hypernym of clock radio; that is, receiving set is a word with a broader meaning than clock radio:

clock radio: a radio that includes a clock that can be set to turn it on automatically
receiving set: an electronic receiver that detects and demodulates and amplifies transmitted signals

Other hypernyms of clock radio include radio, radio receiver, radio set, tuner, wireless.

clock radio (noun)	receiving set (noun)
a radio that includes a clock that can be set to turn it on automatically	an electronic receiver that detects and demodulates and amplifies transmitted signals