The prefix "at-" is commonly used to indicate a location or position, but there are several synonyms that can be used in its place depending on context. Examples include "in," "on," "near," "by," "alongside," "beside," "adjacent to," "against," "upon," and "within." Each of these synonyms conveys a slightly different sense of proximity or location. For example, "in" and "within" suggest being enclosed or surrounded, while "on" and "upon" indicate being in contact with a surface. Choosing the appropriate synonym for "at-" can help to clarify meaning and improve the precision of written or spoken language.