wireless vs radio receiver

wireless and radio receiver both are nouns.

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

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

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

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

wireless (noun)	radio receiver (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
transmission by radio waves
medium for communication

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