valuation vs rating

valuation and rating both are nouns.

Word	Noun	Adjective	Verb	Adverb
valuation	Yes	No	No	No
rating	Yes	No	No	No

As nouns, valuation and rating are synonyms defined as:

Other synonyms of valuation include evaluation.

valuation (noun)	rating (noun)
an appraisal of the value of something	act of ascertaining or fixing the value or worth of
assessed price	an appraisal of the value of something
	standing or position on a scale
	rank in a military organization