WordNet (r) 3.0 (2006):

part with
    v 1: give up what is not strictly needed; "he asked if they
         could spare one of their horses to speed his journey" [syn:
         spare, give up, part with, dispense with]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "part with":
   abandon, abjure, cast, cast aside, cast away, cast off, cede,
   chuck, deep-six, discard, disgorge, dispense with, dispose of,
   ditch, do without, drop, dump, eighty-six, eliminate, forgo,
   forswear, get along without, get quit of, get rid of, get shut of,
   give away, give up, have done with, jettison, jilt, kiss good-bye,
   make a sacrifice, quitclaim, recant, reject, relinquish, remove,
   render up, renounce, resign, retract, sacrifice, slough, spare,
   surrender, swear off, throw away, throw out, throw over,
   throw overboard, throw up, toss overboard, vacate, waive, yield