masked ball vs masquerade ball

masked ball and masquerade ball both are nouns.

Word	Noun	Adjective	Verb	Adverb
masked ball	Yes	No	No	No
masquerade ball	Yes	No	No	No

As nouns, masked ball and masquerade ball are synonyms defined as:

masked ball and masquerade ball: a ball at which guests wear costumes and masks

Other synonyms of masked ball include fancy-dress ball.

masked ball (noun)	masquerade ball (noun)
a ball at which guests wear costumes and masks	a ball at which guests wear costumes and masks