Some words that mean highest point are top, summit, pinnacle, or apex.
Apogee and peak are also words for highest point.
Words meaning the highest point: * peak * climax * pinnacle * top
it means peak or the highest point
Culmination means reaching a highest point.
epitome
apex, acme
The word Zenith means the highest or most powerful point. Nadir means the weakest. Also, Peak, as in a mountain peak.
The word is treetop.
Probably ZENITH which basically means utmost.
The highest point of a fir is the treetop.
It means to reach the highest point,summit or highest development
Treetop, the highest point on any tree.
Treetop