slowness in WordNet English dictionary

1. unskillfulness resulting from a lack of training
   awkwardness  clumsiness  ineptness  ineptitude  maladroitness  slowness 
   
2. lack of normal development of intellectual capacities
   retardation  mental retardation  backwardness  slowness  subnormality 
   
3. a rate demonstrating an absence of haste or hurry
   slowness  deliberation  deliberateness  unhurriedness