finis vs ending

finis and ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
finis	Yes	No	No	No
ending	Yes	No	No	No

As nouns, ending is a hypernym of finis; that is, ending is a word with a broader meaning than finis:

Other hypernyms of finis include end.

finis (noun)	ending (noun)
the concluding part of any performance	the act of ending something
the temporal end; the concluding time	the end of a word (a suffix or inflectional ending or final morpheme)
	the last section of a communication
	event whose occurrence ends something
	the point in time at which something ends