1. (noun) a rate that is rapid

• celerity
• quickness
• rapidity
• rapidness

1. (noun) a rate that is rapid

• despatch
• dispatch
• expedition
• expeditiousness
• fleetness
• immediacy
• immediateness
• instancy
• instantaneousness
• promptitude
• promptness

1. (noun) a rate that is rapid

• pace
• rate

1. (noun) a rate that is rapid

• agile
• nimble
• quick
• spry
• fast
• flying
• quick
• immediate
• prompt
• quick
• straightaway
• quick
• warm
• quick
• quick
• speedy
• speedy
• rapid
• rapid
• rapid
• rapid
• rapid
• speedy
• speedy
• speedy