woofer vs loudspeaker system

woofer and loudspeaker system both are nouns.

Word	Noun	Adjective	Verb	Adverb
woofer	Yes	No	No	No
loudspeaker system	Yes	No	No	No

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

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

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

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