IPA: /ˈɔːrθoʊˌsɛntər/
KK: /ɔrθoʊˌsɛntər/
The point where the three heights of a triangle meet.
In geometry class, we learned that the orthocenter is an important point in triangle construction.
Orthocenter → It is formed from "ortho-" (from Greek "orthos", meaning straight or correct) and "center" (from Latin "centrum", meaning the middle point). The word "orthocenter" refers to the point where the altitudes of a triangle intersect, thus representing a 'correct' or 'straight' center of the triangle.
Think of 'straight' ('ortho-') leading to the 'middle point' ('center') of a triangle, which helps you remember that the orthocenter is the point where all the heights meet.
No commonly confused words.