stopping point vs ending

stopping point and ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
stopping point	Yes	No	No	No
ending	Yes	No	No	No

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

Other hypernyms of stopping point include end.

stopping point (noun)	ending (noun)
the temporal end; the concluding time	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