You have a Table of Figures in word and the descriptions do not line up, and some of the lines wrap. Since there isn't a tab after the figure/table number, lines do not wrap correctly.
There isn't a way to do this by setting a format when you create the table. You have to start when you are creating each of the captions.
You have to add a tab in each caption e.g. Figure 23:<tab>A photo of a kitten.
Then once you build your table you can set up tabs for the style used in your Table of Figures.