finale vs closing curtain

finale and closing curtain both are nouns.

Word	Noun	Adjective	Verb	Adverb
finale	Yes	No	No	No
closing curtain	Yes	No	No	No

As nouns, finale and closing curtain are synonyms defined as:

Other synonyms of finale include close, finis.

finale (noun)	closing curtain (noun)
the concluding part of any performance	the concluding part of any performance
the closing section of a musical composition
the temporal end; the concluding time