More flat-footed refers to a person's lack of arch in their feet, causing them to walk with a heavy step. A few synonyms for the term could be clumsy, lumbering, awkward, or heavy-footed. Utilizing these synonyms can help a writer add variety and nuance to their writing. Furthermore, these words can help to convey not only the physical trait but also an implication of a lack of grace or coordination. By using alternatives to more flat-footed, writers can paint clearer and more vivid pictures of characters and situations in their writing.