The crossword solutions for the term FOOT CURVE are ARCH, which is a four-letter word. An ARCH is a curved structure that is used to span an opening and support the weight above it. Arches are commonly found in architecture, such as doorways, windows, and bridges. They are also used in engineering, such as in the construction of dams and tunnels. The curve of an ARCH helps to distribute the weight evenly and reduce the amount of stress on the structure.