The Collaborative International Dictionary of English v.0.48:

finalize \finalize\ v. t. [imp. & p. p. finalized; p. pr. &
   vb. n. finalizing.]
   to put the last touches on; put into final form.

   Syn: make final, settle, nail down.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

finalize
    v 1: make final; put the last touches on; put into final form;
         "let's finalize the proposal" [syn: finalize, finalise,
         settle, nail down]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "finalize":
   KO, button up, call off, cancel, cap, carry to completion,
   clean up, climax, clinch, close out, close up, complete, conclude,
   crown, culminate, decide, delete, dispose of, drop the curtain,
   end, end off, expunge, extinguish, finish, finish off, finish up,
   fold up, get done, get it over, get over with, get through,
   get through with, give the quietus, kayo, kibosh, kill, knock out,
   mop up, perfect, polish off, put paid to, round out, scrag, settle,
   sew up, shoot down, terminate, top off, top out, wind up, wipe out,
   wrap up, zap