nimbleness (n.)

• acuity
• acuteness
• adroitness
• agility
• alacrity
• alertness
• aptitude
• aptness
• attention
• attentiveness
• brightness
• brilliance
• briskness
• cleverness
• dexterity
• dispatch
• esprit
• expedition
• expeditiousness
• flair
• genius
• keenness
• lightness
• nous
• promptitude
• promptness
• punctuality
• quick-wittedness
• quickness
• readiness
• savvy
• sharpness
• sleeplessness
• smartness
• smarts
• speediness
• swiftness
• talent
• wakefulness