Matching items in Excel Columns

If I have two Columns in an Excel spreadsheet of numbers and there are NOT the same number of items in each column, is there an easy way to match up like items. I’ve sorted them, but it doesn’t help much because there are miscellaneous items in between due to the difference in list size. I would like for the like items to be matched up side by side or highlighted. Is this possible? Any help would be appreciated.