The Collaborative International Dictionary of English v.0.48:

Indenizen \In*den"i*zen\, v. t. [imp. & p. p. Indenizened; p.
   pr. & vb. n. Indenizening.]
   To invest with the privileges of a denizen; to naturalize.
   [R.]
   [1913 Webster]

         Words indenizened, and commonly used as English. --B.
                                                  Jonson.
   [1913 Webster]