ex-ante evaluation vs rating

ex-ante evaluation and rating both are nouns.

Word	Noun	Adjective	Verb	Adverb
ex-ante evaluation	Yes	No	No	No
rating	Yes	No	No	No

As nouns, rating is a hypernym of ex-ante evaluation; that is, rating is a word with a broader meaning than ex-ante evaluation:

ex-ante evaluation: a forward-looking assessment of the likely future effects of new initiatives.
rating: an appraisal of the value of something

Other hypernyms of ex-ante evaluation include evaluation, valuation.

ex-ante evaluation (noun)	rating (noun)
a forward-looking assessment of the likely future effects of new initiatives.	act of ascertaining or fixing the value or worth of
	an appraisal of the value of something
	standing or position on a scale
	rank in a military organization