They are not alike but they are related.
A positive acceleration means an increase in velocity (speed).
A negative acceleration means a decrease in velocity.
Velocity (speed) has the dimensions of distance / time.
Acceleration has the dimensions of distance/time2 or velocity/time.
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Acceleration is the time rate of change of speed. Acceleration = speed/time.
Acceleration is the rate that speed changes.
constant speed=0 acceleration Acceleration is the change in speed. If the speed doesn't change(ie constant) the acceleration is zero.
Average acceleration = Change in speed/time so Time = Change in speed/Average acceleration
acceleration times speed