loudspeaker vs speaker unit

loudspeaker and speaker unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
loudspeaker	Yes	No	No	No
speaker unit	Yes	No	No	No

As nouns, loudspeaker and speaker unit are synonyms defined as:

loudspeaker and speaker unit: electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance

Other synonyms of loudspeaker include loudspeaker system, speaker, speaker system.

loudspeaker (noun)	speaker unit (noun)
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance	electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance