Star is one of the shapes. This is available under the Shape menu. To get this feature, click on Insert tab. If you click insert tab, you will get a shape menu, and then click on the arrow under shape icon which displays lots of shapes available in the word.
It contains recently used shapes in the top. If you don’t find star under the recently used shapes, you can find that below the recently used shape. Shapes contains other shapes like basic and advanced shapes.
