Swift
Agil
Swift or agile
Lightfoot
A person who walks lightly or nimbly
Presto
Immediately or without delay
Quicksilver
A reference to the fast-moving liquid metal, symbolizing agility and speed
Speedy
Fast or quick
Swifty
Swift, quick
Swish
To move with a light, sweeping motion
Swoosh
A quick movement or sound of something moving swiftly