n.
1.
Celerity, expedition, velocity, speed, speediness, fleetness, rapidity, swiftness, despatch, haste.
2.
Activity, briskness, nimbleness, readiness, promptness, promptitude, alertness, agility, smartness, liveliness.
3.
Dexterity, adroitness, expertness, dexterousness, aptness, aptitude, facility, knack.
4.
Sharpness, penetration, keenness, acuteness, sagacity, shrewdness, perspicacity, acumen.
5.
Sharpness, pungency, keenness.