turning point vs intersection

turning point and intersection both are nouns.

Word	Noun	Adjective	Verb	Adverb
turning point	Yes	No	No	No
intersection	Yes	No	No	No

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

Other hypernyms of turning point include carrefour, crossing, crossroad, crossway.

turning point (noun)	intersection (noun)
the intersection of two streets	the act of intersecting (as joining by causing your path to intersect your target's path)
an event marking a unique or important historical change of course or one on which important developments depend	a junction where one street or road crosses another
	a point where lines intersect
	a representation of common ground between theories or phenomena
	the set of elements common to two or more sets
	a point or set of points common to two or more geometric configurations