The term 'ARCH TYPES' can be broken down into two crossword solutions: OGEES (5 letters) and ARCHES (6 letters). OGEES are a type of arch that is curved in the shape of an 'S' and is often used in Gothic architecture. ARCHES are a type of structure that is curved and typically used to span an opening, such as a doorway or window. Both OGEES and ARCHES are considered to be classic examples of architectural design and are often used in traditional buildings.