Vertex covers are sets of vertices that cover all the edges in a graph.

I need to buy some extra covers for my sofa.

I bought some slut-covers for my pillows.

I need to buy new toilet covers for all the bathrooms.

The umbrella-covers were all neatly stacked in the corner.

The fourth covers of the book series were released last week.

The third covers of the book series are now available for pre-order.

The new book covers ground that has not been explored before.

I noticed several manhole covers on the street.

The ambulance covers were all damaged in the storm.