Arches are arbour-like structures created over walkways or garden paths to support climbing plants (climbers and ramblers). They not only provide structural support but also enhance the aesthetic appeal of the landscape.
Pergolas are similar structures but usually larger and more open, often forming shaded walkways or sitting areas.
Hedges are dense rows of shrubs or small trees used as boundaries.
Shrubbery refers to an area planted with shrubs.
Thus, the correct term for arbour-like structures over walkways supporting climbers is arches.