How to limit the number of rows in a range to search for a word in a Google spreadsheet column?

Question

Google

How to limit the number of rows in a range to search for a word in a Google spreadsheet column?
Looking for a word in a table column using code like this

function check(sheetName, column, word) {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheetByName(sheetName);
  var range = sheet.getRange(column);
  var values = range.getValues();

  var result = false;
  for (var i = 0; i < values.length; i++) {
    if (values[i][0] == word) {
      result = i+1;
      break;
    }
  }
  return result;
}

The row range is taken as 1000 rows. Increasing the running time of the script. Whether it is possible to limit somehow a range on lines it is admissible through last.row?