stage monitor vs monitor speaker

stage monitor and monitor speaker both are nouns.

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

As nouns, stage monitor and monitor speaker are synonyms defined as:

stage monitor and monitor speaker: One of the speakers on stage pointing towards the performers to help them hear themselves.

stage monitor (noun)	monitor speaker (noun)
One of the speakers on stage pointing towards the performers to help them hear themselves.	One of the speakers on stage pointing towards the performers to help them hear themselves.