There are many synonyms for the phrase "are wary of," which means to be cautious or suspicious of something or someone. Some examples include: cautious, suspicious, leery, vigilant, watchful, guarded, apprehensive, uncertain, hesitant, and distrustful. Each of these words suggests a similar feeling of hesitation or reluctance to trust, but they can also have slightly different connotations depending on the context. For instance, "guarded" may imply a more deliberate or calculated form of caution, whereas "distrustful" suggests a lack of trust that is rooted in past experiences or perceptions. Ultimately, the choice of synonym will depend on the specific situation and intended tone.