radio receiver vs wireless

radio receiver and wireless both are nouns.

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

As nouns, radio receiver and wireless are synonyms defined as:

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

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

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

radio receiver (adjective)	wireless (adjective)
	having no wires