overlap

to cover something partly by going over its edge; to cover part of the same space:

The fence is made of panels that overlap (each other).

If two or more activities, subjects, or periods of time overlap, they have some parts that are the same:

My musical tastes don't overlap with my brother's at all.

the amount by which two things or activities cover the same area:

The roof tiles will need an overlap of several centimetres.

There are some overlaps between the products of the two companies.