woofer vs loudspeaker

woofer and loudspeaker both are nouns.

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

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

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

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

woofer (noun)	loudspeaker (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