1. (adjective) moving quickly and lightly

• agile
• quick
• spry

2. (adjective) mentally quick

• agile

1. (adjective) moving quickly and lightly

• active

2. (adjective) mentally quick

• intelligent

1. (adjective) moving quickly and lightly

• adeptness
• adroitness
• deftness
• facility
• quickness
• agility
• agility
• legerity
• legerity
• lightness
• lightness
• lightsomeness
• lightsomeness
• nimbleness
• nimbleness
• celerity
• quickness
• rapidity
• rapidness
• speediness

2. (adjective) mentally quick

• mental dexterity
• nimbleness