Synonyms for Sharp:

adj.

abrasive (adjective)
spiky.
active (adjective)
lively.
attentive (adjective)
concerned, intent, cautious, diligent, alert, observant, attentive, Scrutinizing, mindful, careful, heedful, Concentrating, enraptured, fascinated, responsible, watchful, engrossed, Immersed, observing, regardful, Hearkening, absorbed, vigilant, entranced, interested, Considering, rapt.
cold (adjective)
chilly.
conical (adjective)
tapering.
excellent (adjective)
excellent, distinctive, first class, fine.
extreme (adjective)
high.
fashionable (adjective)
chic, stylish.
intelligent (adjective)
erudite, gifted, intellectual, intelligent, cogent, perspicacious, capable, incisive, brainy, genius, knowledgeable, worldly, astute, keen, knowing, canny, clever, sagacious, profound, encyclopedic, brilliant, bright, sophisticated, wise, Comprehending, smart.
mordant (adjective)
mordant.
painful (adjective)
stinging.
plush (adjective)
swanky.
pungent (adjective)
spicy, acrid, pungent, piquant, poignant, bitter, sour, caustic, tangy.
rough (adjective)
chapped.
sharp (adjective)
jagged, spiky, needle-like, spinous, cutting, barbed, bristly, pointed, spiny, prickly, Thistly, needle-point, pointy, acute, sagittal, razor-edged, keen, thorny, spear-like, spiked.
short (adjective)
short.
sour (adjective)
pungent, acidic, piquant, acerbic, bitter, unripe, tart, acerb, sour.
stylish (adjective)
dressy, chic, modernistic, fashionable.
trenchant (adjective)
razor-sharp.
vigilant (adjective)
close.
vigorous (adjective)
energetic, lively, active.

adv.

all (adverb)
sharply.

n.

aciculate, Aciculated, able, peaked, salient, acuminate, briery, academic, tapering, stinging. back, Against, about, down, onward, backward, biting, around, up, outside. brackish, chocolatey, bittersweet, chocolate, flavored, fiery. allegro, Sharp-witted, bass clef, ability, adagio, bar, andante, con brio, con amore, clef, ARR, bar line. futuristic, up-to-the-minute, sensitive, advanced, contemporary, modernistic, modern, trenchant, ahead of your/its etc. time, space age, state of the art, probing. loud, resounding, shooting, big, Gnawing, deafening, noisy, Ear-splitting, riotous, can't hear yourself think, uproarious. manifest, apparent, taste, show up, identifiable, perceptible, zesty, plain, noticeable. deceitful, unscrupulous, untruthful, unprincipled, dishonest, corrupt, dubious. developmental, radically, away, gradual, gradually, drastic, evolutionary, cosmetic, radical, quicksilver. left-handed, razor-sharp, serrated, Two-edged, double-edged. frost, icicle, glare ice, ice over, frozen, black ice, hard. chesty, breathless, labored, indrawn, bronchial, deeply, pulmonary, heavily, choke. diatonic, major, minor, tonic, chromatic. in time, just in time, punctual, promptly, well-timed, duly, prompt, on the dot. distinct (noun)
clear, visible, audible, definite, obvious, explicit.
intense (noun)
biting.
sharp (noun)
discriminating, astringent, intense, distinct, piercing, acerb, sharply, astute, keen, scratching, unpleasant, fulgurating, sharp-worded, high-pitched, acute, precipitous, sharpened, shrewd, intelligent, high, forceful, smart, steep, sour, sudden, knifelike, edged, penetrative, shrill, crisp, abrupt, stabbing, lancinating, salt, perceptive, acuate, penetrating, lancinate, carnassial, tart, acerbic, incisive, cutting.

Other synonyms:

classy, acicular, glare ice, black ice, probing, punctual, mordacious, cuspidate, mod, zesty, ice over, cuspidated, well-timed, diatonic, chromatic, aciculate, fashionable, icicle, guileful, acuminate, serrated, trenchant, unambiguous, Mucronate, trig, cuspate, just in time, briery, cuspated, chic, Tony, Gnawing, Aciculated, impassable. double-edged, with-it, arterial, trendy, frozen, stylish, left-handed, duly, unequivocal, definite, active, unmistakable, scathing, corrosive, Two-edged, slashing, posh, Sharp-witted, frost. one-way, two-way, feeder, promptly, shooting, razor-sharp. minor, dashing, truculent, modish. in, prompt. tight, tonic, major. hard. biting
vitriolic.
caustic
burning.
discernible
clear.
distinct
distinct.
high-pitched
high-pitched.
stringent
mordant.
up-to-date
modern.

Usage examples for sharp

  1. And look sharp about it, and don't keep them waiting. – Old Peter's Russian Tales by Arthur Ransome
  2. Macallister gave him a sharp glance. – The Coast of Adventure by Harold Bindloss
  3. " Then he'd better look sharp after the will," said Undershaw, with a smile. – The Mating of Lydia by Mrs. Humphry Ward