a lofty peak.

the highest or culminating point, as of success, power, fame, etc.

the pinnacle of one's career.

any pointed, towering part or formation, as of rock.

Architecture . a relatively small, upright structure, commonly terminating in a gable, a pyramid, or a cone, rising above the roof or coping of a building, or capping a tower, buttress, or other projecting architectural member.

to place on or as on a pinnacle.

to form a pinnacle on; crown.

noun

base , bottom , nadir

noun

acme , apex , apogee , climax , cone , crown , culmination , greatest , height , max , most * , needle * , obelisk , peak , pyramid , spire , steeple , summit , tops , tower , vertex , zenith , crest , meridian , top , belfry , finial , serac , turret