Synonyms for Towering:

adj.

all (adjective)
lofty, soaring, eminent.
elephantine (adjective)
enormous, extensive, grand, giant, big, immense, gargantuan, humongous, mammoth, large.
excessive (adjective)
sky-high.
exorbitant (adjective)
out of sight.
fantastic (adjective)
overwhelming, severe, huge.
gargantuan (adjective)
vast, elephantine.
high (adjective)
soaring.
large (adjective)
cavernous, colossal, baggy, huge, prodigious, magnificent, gigantic, extensive, comprehensive, immense, elephantine, roomy, capacious, awesome, enormous, great, bulky, generous, lofty, vast, spacious, large, big, copious, majestic, grand, princely, tremendous, voluminous, grandiose, soaring, giant, humongous, ample, mammoth, massive, impressive, expansive, gargantuan, sizable.
sky-high (adjective)
sky-high.
successful (adjective)
distinguished, brilliant, high-flying, triumphant, thriving, successful, leading.
towering (adjective)
colossal, preeminent, airy, extraordinary, tremendous, high, lofty, great, prodigious, impressive, massive, soaring, magnificent, aerial, outstanding, gigantic.

n.

airy, severe, acute, desperate, grave, rigorous, aerial, dire, serious, sky-high, profound, awful. overwhelming, staggering, overpowering. towering (noun)
high, lofty, soaring, eminent.

Other synonyms:

sky-high, STANDOUT, out of sight. extraordinary, overpowering, preeminent, exceptional. outstanding, staggering, remarkable, aerial, uncommon, overwhelming. rare, airy. singular. unusual. Other relevant words:
leading, rare, thriving, serious, unusual, severe, dire, acute, successful, level, overpowering, precipitous, out of sight, uncommon, sky-high, knee-high, aerial, desperate, remarkable, extraordinary, preeminent, high-flying, staggering, triumphant, eminent, grave, outstanding, singular, better, exceptional, low-rise, awful, brilliant, airy, rigorous, higher, STANDOUT, distinguished, high, usual, profound, overwhelming.

Usage examples for towering

  1. I next found myself under the shadow of a huge rock towering above me amidst the scrubs, but too hidden to perceive until I reached it. – Australia Twice Traversed, The Romance of Exploration Australia Twice Traversed. The Romance Of Exploration, Being A Narrative Compiled From The Journals Of Five Exploring Expeditions Into And Through Central South Australia, And Western Australia, From 1 by Ernest Giles
  2. It made a towering heap. – A Prisoner in Fairyland by Algernon Blackwood
  3. There were a lot of moving things round him, towering big things, that came and went like shadows. – Four Weird Tales by Algernon Blackwood