rating vs assessment

rating and assessment both are nouns.

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

As nouns, assessment is a hypernym of rating; that is, assessment is a word with a broader meaning than rating:

Other hypernyms of rating include judgement, judgment.

As nouns, assessment is a hypernym of rating; that is, assessment is a word with a broader meaning than rating:

rating: an appraisal of the value of something
assessment: the classification of someone or something with respect to its worth

Other hypernyms of rating include appraisal.

rating (noun)	assessment (noun)
act of ascertaining or fixing the value or worth of	the act of judging or assessing a person or situation or event
an appraisal of the value of something	the market value set on assets
standing or position on a scale	the classification of someone or something with respect to its worth
rank in a military organization	an amount determined as payable