The Collaborative International Dictionary of English v.0.48:

Acrase \A*crase"\, Acraze \A*craze"\, v. t. [Pref. a- + crase;
   or cf. F. ['e]craser to crush. See Crase, Craze.]
   [1913 Webster]
   1. To craze. [Obs.] --Grafton.
      [1913 Webster]

   2. To impair; to destroy. [Obs.] --Hacket.
      [1913 Webster] Acrasia