ending vs final result

ending and final result both are nouns.

Word	Noun	Adjective	Verb	Adverb
ending	Yes	No	No	No
final result	Yes	No	No	No

As nouns, final result is a hyponym of ending; that is, final result is a word with a more specific, narrower meaning than ending:

ending (noun)	final result (noun)
the act of ending something	something that results
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