Cannot implicitly convert int to string

foreach (var kv in json["lines"]) // there might be a faster way to do this? looks like this algo is On^ NO ITS NOT
          {
            Dictionary<string, int> lyricMap = new Dictionary<string, int>();
            string words = kv.words;
            int timeList = kv.startTimeMs;
            lyricMap.Add("words", timeList);
            {
              string wordMap = lyricMap["words"];
            }
          }