zeniths
Tops of arcs
Zeniths is the plural of zenith, which usually doesn’t need a plural.
The zenith is the highest point of something.
astronomical
Pole-to-pole great circle
- culminationHighest or final point
- celestialOf the sky above
- transitMovement between places
- altitudeMeasured height above reference
apex · overhead · nadir · azimuth · declination · ascension · observatory · telescope
meridian
Pole-to-pole great circle
- culminationHighest or final point
- celestialOf the sky above
- transitMovement between places
altitude · apex · overhead · nadir · azimuth · declination · ascension · observatory · telescope · stargazing
peaks
Highest points attained
- pinnaclesHighest or culminating points
- heightsVertical measurements or summits
- apexesUppermost points of things
summits · crowns · climaxes · acmes · apogees · high points · triumphs · glory · success · accomplishments
empires
Extensive ruled territories
- dynastiesSuccessive rulers from one family
- reignsHolds sovereign power
- civilizationsComplex organized human societies
dominance · supremacy · influence · authority · eras · epochs · hegemonies · kingdoms · rule · ascendancy