superhet vs radio receiver

superhet and radio receiver both are nouns.

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

As nouns, radio receiver is a hypernym of superhet; that is, radio receiver 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 receiver: an electronic receiver that detects and demodulates and amplifies transmitted signals

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

superhet (noun)	radio receiver (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