terminal point vs ending

terminal point and ending both are nouns.

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

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

Other hypernyms of terminal point include end.

terminal point (noun)	ending (noun)
final or latest limiting point	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