The term "normal divide" refers to the expected differences or distance between two things or groups. However, there are several other ways to express this concept. For instance, you may use the term "dichotomy," which implies a clear division between two opposing ideas. Alternatively, you can use "boundary" to indicate a clear distinction between two areas or domains. "Gap," "disparity," and "cleavage" are also appropriate terms to describe the divide between two groups. Using synonyms not only helps enhance your writing but also expands your vocabulary and enables you to express your ideas more accurately.