Hedge shrubs are a type of shrub that is used to create a boundary or barrier. Common examples of hedge shrubs include privets, which have seven letters, and yews, which have four letters. Privets are evergreen shrubs with small white flowers and dark green leaves, while yews are coniferous shrubs with flat needles and red berries. Both privets and yews are popular choices for hedges due to their dense foliage and ability to be trimmed into a desired shape.