Boiled-down is often used as a descriptor for something that has been simplified or reduced to its most essential elements. However, if you want to switch up your vocabulary and avoid repetition, there are several great synonyms you can use. For instance, distilled, condensed, concentrated, or abridged are all excellent options. Each of these words conveys the same idea of simplification or reduction. Another great word to use in place of boiled-down is summarized. Using these synonyms in your writing can add variety and interest to your sentences while conveying the same meaning as boiled-down.