When we think of the phrase "in retreat," we often associate it with the idea of withdrawing or pulling back from a situation or location. However, there are numerous synonyms that can be used to convey a similar meaning. For example, phrases like "in decline," "in regression," or "in a state of decline" suggest a gradual weakening or reduction in strength or numbers. Other potential synonyms might include "in decline," "in retrograde," or "in recession" which imply a negative trend or reversal of fortunes. Regardless of the specific wording used, the general sense of "in retreat" is one of diminishing power or influence, and these synonyms can help to convey that idea in a more nuanced way.