When inserting a table in a Word document, you can stick with the default alignment or change it in several ways.

The article How to control a Word table’s horizontal alignment shows you how to manually align tables between the left and right margins. It’s a quick task when working with only a few tables.

Use Word 2010's Numbering feature in tables and make it automatically number multiple table columns vertically. This way, each cell in each column will be placed under the correct number.