"One the other" is a phrase used to describe two things that are being compared or contrasted. However, there are several synonyms that can be used in place of this phrase. Some of these synonyms include "on the one hand...on the other hand," "in contrast," "conversely," "instead," "otherwise," and "differently." Depending on the context in which the phrase is being used, any of these synonyms can effectively convey the intended meaning. Utilizing a variety of synonyms when writing or speaking can help to keep language interesting and engaging, as well as prevent overuse of certain phrases.