When it comes to discussing important matters, "conference at summit" is one of the phrases that come to mind. However, there are numerous synonyms that can be used in its place, such as "high-level meeting," "summit gathering," "conclave," "forum," "seminar," "convention," and "assembly." Each of these words describes a gathering or meeting that involves top-level officials or experts discussing critical issues or making impactful decisions. Regardless of the word you choose to replace "conference at summit," its meaning always boils down to the notion of a high-level meeting aimed at achieving significant outcomes.