assessment vs rating

assessment and rating both are nouns.

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

As nouns, rating is a hyponym of assessment; that is, rating is a word with a more specific, narrower meaning than assessment:

As nouns, rating is a hyponym of assessment; that is, rating is a word with a more specific, narrower meaning than assessment:

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

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