tweeter vs speaker system

tweeter and speaker system both are nouns.

Word	Noun	Adjective	Verb	Adverb
tweeter	Yes	No	No	No
speaker system	Yes	No	No	No

As nouns, speaker system is a hypernym of tweeter; that is, speaker system is a word with a broader meaning than tweeter:

tweeter: a loudspeaker that reproduces higher audio frequency sounds
speaker system: electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance

Other hypernyms of tweeter include loudspeaker, loudspeaker system, speaker, speaker unit.

tweeter (noun)	speaker system (noun)
a loudspeaker that reproduces higher audio frequency sounds	electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance