The Collaborative International Dictionary of English v.0.48:

Cham \Cham\ (ch[a^]m), v. t. [See Chap.]
   To chew. [Obs. or Prov. Eng.] --Sir T. More.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cham \Cham\ (k[a^]m), n. [See Khan.]
   The sovereign prince of Tartary; -- now usually written
   khan. --Shak.
   [1913 Webster]