WordNet sense 1 (ending in a sharp point):

acuate, needlelike

WordNet sense 2 (having a point):

pointed

WordNet sense 3 (harsh):

tart, sharp-worded

WordNet sense 4 (disagreeable to the senses, to the mind, or feelings ):

unpleasant

WordNet sense 5 (having or demonstrating ability to recognize or draw fine distinctions):

discriminating

WordNet sense 6 (having or emitting a high-pitched and sharp tone or tones ):

shrill

WordNet sense 7 (used of sounds and voices; high in pitch or frequency):

high-pitched

WordNet sense 8 (extremely steep):

abrupt, precipitous

WordNet sense 9 (having a sharp inclination):

steep

WordNet sense 10 (happening without warning or in a short space of time):

sudden

WordNet sense 11 (characterized by or full of force or strength (often but not necessarily physical)):

forceful

WordNet sense 12 (as physically painful as if caused by a sharp instrument):

cutting, keen, piercing, stabbing, knifelike, lancinate, lancinating

WordNet sense 13 (extremely sharp or intense):

acute, intense

WordNet sense 14 (as sharp as a razor):

razor-sharp

WordNet sense 15 (tending to penetrate; having the power of entering or piercing):

penetrating, penetrative

WordNet sense 16 (suitable for cutting or piercing):

incisive

WordNet sense 17 (having a cutting edge or especially an edge or edges as specified; often used in combination):

edged

WordNet sense 18 ((of something seen or heard) clearly defined):

crisp

WordNet sense 19 (easy to perceive; especially clearly outlined):

distinct

WordNet sense 20 (changing suddenly in direction and degree):

acutely, sharply

WordNet sense 21 (marked by practical hardheaded intelligence):

astute, shrewd

WordNet sense 22 (showing mental alertness and calculation and resourcefulness):

smart