The Collaborative International Dictionary of English v.0.48:

Rescat \Res"cat\ (r?s"k?t), v. t. [Sp. rescattar.]
   To ransom; to release; to rescue. [Obs.] --Howell.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rescat \Res"cat\, n. [Sp. rescate.]
   Ransom; release. [Obs.]
   [1913 Webster]