agility
air speed
alacrity
bat
briskness
ceaselessness
celerity
chattering
constancy
constant flow
continualness
continuity
decisiveness
dispatch
expedition
expeditiousness
fastness
fleetness
flight
flit
flurry
gait
ground speed
haste
hurry
immediacy
immediateness
incessancy
instantaneousness
knots
lightning speed
miles per hour
noninterruption
oscillation
pace
perpetuity
precipitation
promptitude
promptness
pulsation
punctuality
punctualness
quick fire
quickness
rapid fire
rapid recurrence
rapid succession
rate
despatch
instancy
boldness
brilliancy
certainty
clearness
dexterity
earnestness
ease
firmness
intensity
lightness
precision
regularity
suddenness
swiftness
vigor
vivacity
acidity
fluidity
humidity
liquidity
morbidity
rigidity
solidity
superfluidity
timidity
turbidity
validity