speediness (n.)

• agility
• alacrity
• briskness
• celerity
• decisiveness
• dispatch
• expedition
• expeditiousness
• fastness
• flight
• flit
• flurry
• haste
• hurry
• hustle
• immediacy
• immediateness
• instantaneousness
• nimbleness
• precipitation
• promptitude
• promptness
• punctuality
• quickness
• rapidity
• readiness
• rpm
• rush
• rustle
• sharpness
• smartness
• speed
• swiftness
• velocity