- vertex - the point of intersection of lines or the point opposite the base of a figure
--1 is a kind of intersection, intersection point, point of intersection
- vertex, peak, apex, acme - the highest point (of something); "at the peak of the pyramid"
--2 is a kind of extreme point, extreme, extremum
--2 has particulars: crown; roof peak - vertex, peak, apex, acme - the highest point (of something); "at the peak of the pyramid"