finis vs closing curtain

finis and closing curtain both are nouns.

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

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

Other synonyms of finis include close, finale.

finis (noun)	closing curtain (noun)
the concluding part of any performance	the concluding part of any performance
the temporal end; the concluding time