rating vs marking

rating and marking both are nouns.

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

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

Other hyponyms of rating include grading, scoring.

rating (noun)	marking (noun)
act of ascertaining or fixing the value or worth of	evaluation of performance by assigning a grade or score
an appraisal of the value of something	the act of making a visible mark on a surface
standing or position on a scale	a pattern of marks
rank in a military organization	a distinguishing symbol