stage monitor vs loudspeaker

stage monitor and loudspeaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
stage monitor	Yes	No	No	No
loudspeaker	Yes	No	No	No

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

stage monitor: One of the speakers on stage pointing towards the performers to help them hear themselves.
loudspeaker: electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance

Other hypernyms of stage monitor include loudspeaker system, speaker, speaker system, speaker unit.

stage monitor (noun)	loudspeaker (noun)
One of the speakers on stage pointing towards the performers to help them hear themselves.	electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance