The word "pre-sided" can be defined as the act of being in charge or leading a group or situation before it begins. Some synonyms for "pre-sided" include "supervised," "oversaw," "guided," "directed," "managed," "organized," and "headed." All of these words suggest a level of authority and responsibility in preparing for an event or situation. Other potential synonyms could include "orchestrated," "facilitated," "administered," or "conducted." Regardless of the exact word used, all of these synonyms for "pre-sided" indicate someone who is taking charge and actively preparing for a successful outcome.