stereo system vs stereophony

stereo system and stereophony both are nouns.

Word	Noun	Adjective	Verb	Adverb
stereo system	Yes	No	No	No
stereophony	Yes	No	No	No

As nouns, stereo system and stereophony are synonyms defined as:

stereo system and stereophony: reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound

Other synonyms of stereo system include stereo, stereophonic system.

stereo system (noun)	stereophony (noun)
reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound	reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound