iPod vs stereophony

iPod and stereophony both are nouns.

Word	Noun	Adjective	Verb	Adverb
iPod	Yes	No	No	No
stereophony	Yes	No	No	No

As nouns, stereophony is a hypernym of iPod; that is, stereophony is a word with a broader meaning than iPod:

iPod: (trademark) a pocket-sized device used to play music files
stereophony: reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound

Other hypernyms of iPod include stereo, stereo system, stereophonic system.

iPod (noun)	stereophony (noun)
(trademark) a pocket-sized device used to play music files	reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound