The phrase "am prone" can mean susceptible or inclined to something. To express the same idea using synonyms, you might say that you're liable, predisposed, or susceptible to a particular behavior or situation. Additionally, you could use phrases like "tend to" or "have a tendency to" if you want to convey a sense of likelihood or frequency. Other synonyms for "am prone" might include "vulnerable," "exposed," or "open to," depending on the context. By utilizing synonyms for this phrase, you can add a bit of variety to your language and avoid repetition while still conveying the same essential meaning.