rating vs valuation

rating and valuation both are nouns.

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

As nouns, rating and valuation are synonyms defined as:

Other synonyms of rating include evaluation.

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