The phrase "topmost points" refers to the highest point or peak of something. Synonyms for this phrase include summit, pinnacle, crest, zenith, apex, and peak. Each of these words emphasizes the height or importance of the highest point. The summit is used to refer to the highest point of a mountain or hill. Pinnacle refers to the highest point of success or achievement. Crest is used to refer to the highest point of a wave or a mountain range. Zenith is often used to describe the highest point of success or popularity. Apex is used to describe the highest point of power or hierarchical position. Finally, peak refers to the highest point of a mountain or achievement as well.