index◼◼◼[UK: ˈɪn.deks] [US: ˈɪn.deks] classification◼◼◻[UK: ˌklæ.sɪ.fɪˈk.eɪʃ.n̩] [US: ˌklæ.sə.fəˈk.eɪʃ.n̩] filling◼◼◻[UK: ˈfɪl.ɪŋ] [US: ˈfɪl.ɪŋ] grading◼◻◻[UK: ˈɡreɪd.ɪŋ] [US: ˈɡreɪd.ɪŋ] rank◼◻◻[UK: ræŋk] [US: ˈræŋk] ranking◼◻◻[UK: ˈræŋkɪŋ] [US: ˈræŋkɪŋ] | 