superhet vs radio set

superhet and radio set both are nouns.

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

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

superhet: a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified
radio set: an electronic receiver that detects and demodulates and amplifies transmitted signals

Other hypernyms of superhet include radio, radio receiver, receiving set, tuner, wireless.

superhet (noun)	radio set (noun)
a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified	an electronic receiver that detects and demodulates and amplifies transmitted signals