Synonyms for Pinnacle:

adj.

summit (adjective)
maximum, extreme, Headmost, Culminating, peak, tip, crowning, Capping, apex, summit, acme, top, highest, uppermost, zenith, loftiest, topmost.

n.

comeback, tower, high tide, steeple, someone's day in the sun, glory days, breakthrough, belfry, golden age, flowering. meteorite, gravel, payoff, apogee, pebble, scree, shingle, boulder, flint, rock, high, fastigium, spar. cairn, escarpment, divide, Brae, brink, crag, the brow. apex (noun)
maximum, tip, crest.
climax (noun)
limit, payoff, top, extremity.
crescendo (noun)
elevation.
crest (noun)
fastigium.
extremity (noun)
brink, extreme.
heaven (noun)
climax, joyfulness, happiness, zion, shangri-la, canaan, azure, stratosphere, ether, summit, everlastingness, immortality, culmination, ecstasy, eternity, nirvana, apex, wonderland, bliss, land o'goshen, rhapsody, afterworld, glory, heaven, hereafter, mountaintop, acme, paradise, eden, spire, dreamland, goshen, fairyland, zenith.
height (noun)
brow, height.
pinnacle (noun)
climax, spire, steeple, zenith, crown, top, apex, acme, height, culmination, summit, superlative, apogee, peak, elevation, tower.
summit (noun)
crest, extremity, cap, limit, crown, highest point, topmost point, uppermost point, brow.
top (noun)
zenith.
tower (noun)
spire.

Other synonyms:

breakthrough, glory days, boulder, comeback, meteorite, gravel, golden age, apogee, fastigium, payoff, pebble, high tide. flowering, shingle. flint. spar. rock.

Usage examples for pinnacle

  1. To the astonishment of the gaping Indians, the doctor, as he wheeled his horse, shot a hawk that was hovering over the pinnacle of the gateway, and we rode up to the house. – Incidents of Travel in Yucatan, Vol. I. by John L. Stephens
  2. She vaguely tried to calculate the altitude of the pinnacle from which he must have looked down upon her. – Maggie: A Girl of the Streets by Stephen Crane