year-end vs ending

year-end and ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
year-end	Yes	Yes	No	No
ending	Yes	No	No	No

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

Other hypernyms of year-end include end.

year-end (noun)	ending (noun)
the end of a calendar year	the act of ending something
	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

year-end (adjective)	ending (adjective)
taking place at the close of a fiscal year