terminal point vs terminus ad quem

terminal point and terminus ad quem both are nouns.

Word	Noun	Adjective	Verb	Adverb
terminal point	Yes	No	No	No
terminus ad quem	Yes	No	No	No

As nouns, terminal point and terminus ad quem are synonyms defined as:

Other synonyms of terminal point include limit.

terminal point (noun)	terminus ad quem (noun)
final or latest limiting point	final or latest limiting point