The Collaborative International Dictionary of English v.0.48:

Rhetorize \Rhet"o*rize\ (r[e^]t"[-o]*r[imac]z), v. i. [imp. & p.
   p. Rhetorized (-r[imac]zd); p. pr. & vb. n. Rhetorizing
   (-r[imac]`z[i^]ng).]
   To play the orator. --Colgrave.
   [1913 Webster]