The antonyms for the word "most wall to wall" could vary depending on the context. However, some possible antonyms could be "sparse," "minimal," "scattered," "sporadic," or "intermittent." These words imply a lack of density or coverage, which is the opposite of the meaning conveyed by "most wall to wall." For example, a sparse carpet would have fewer fibers per square inch than a wall-to-wall carpet. Similarly, a room with minimal furniture would not be as densely furnished as a room with wall-to-wall sofas and shelves. In short, antonyms of "most wall to wall" suggest a more open or uncluttered space.