ghetto blaster vs stereo system

ghetto blaster and stereo system both are nouns.

Word	Noun	Adjective	Verb	Adverb
ghetto blaster	Yes	No	No	No
stereo system	Yes	No	No	No

As nouns, stereo system is a hypernym of ghetto blaster; that is, stereo system is a word with a broader meaning than ghetto blaster:

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

Other hypernyms of ghetto blaster include stereo, stereophonic system, stereophony.

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