The phrase "at one side" can be interpreted in various ways, and so there is a range of synonyms available for this phrase. Some alternatives include "on the side," "to the side," "off to the side," "adjacent," and "beside." These synonyms may be used in different contexts, such as describing an object or individual's position relative to another object or individual, or indicating that something is separate from a more central area or group. By using these synonyms, you can add nuance to your language and communicate your meaning more precisely.