The Collaborative International Dictionary of English v.0.48:

Nab \Nab\, v. t. [imp. & p. p. Nabbed (n[a^]bd); p. pr. & vb.
   n. Nabbing.] [Dan nappe, or Sw. nappa.]
   1. To catch or seize suddenly or unexpectedly. [Colloq.]
      --Smollett.
      [1913 Webster]

   2. To capture; to arrest; as, the police nabbed the culprit
      wtrying to hide in the basement.
      [PJC]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "nabbing":
   abduction, apprehension, arrest, arrestation, capture, catch,
   catching, collaring, coup, dragnet, forcible seizure, grab,
   grabbing, hold, kidnapping, picking up, power grab, prehension,
   running in, seizure, seizure of power, snatch, snatching,
   taking in, taking into custody