When describing the positive aspect of something, there are a number of synonyms that can be used for the phrase "good side of." For instance, one could use words like advantage, benefit, or positive outcome. Another option might be to use a phrase like "silver lining," which suggests that even in negative situations, there is still something positive to be found. Other words that could be used to describe the good side of something might include strengths, assets, or merits. Ultimately, the choice of synonym will depend on the context and what specifically is being discussed.