The Collaborative International Dictionary of English v.0.48:

Mobilize \Mob"i*lize\, v. t. [imp. & p. p. Mobilized; p. pr. &
   vb. n. Mobilizing.] [F. mobiliser.]
   1. To assemble and organize and make ready for use or action;
      as, to mobilize volunteers for the election campaign.

   Syn: mobilise, marshal.
        [WordNet 1.5]

   2. Specifically: To put in a state of readiness for active
      service in war, as an army corps; as, to mobilize the
      National Guard.

   Syn: mobilise, militarize, militarise.
        [1913 Webster] Moebius strip

WordNet (r) 3.0 (2006):

mobilize
    v 1: make ready for action or use; "marshal resources" [syn:
         mobilize, mobilise, marshal, summon]
    2: call to arms; of military personnel [syn: call up,
       mobilize, mobilise, rally] [ant: demobilise,
       demobilize, inactivate]
    3: get ready for war [syn: mobilize, mobilise] [ant:
       demob, demobilise, demobilize]
    4: cause to move around; "circulate a rumor" [syn: mobilize,
       mobilise, circulate]

Moby Thesaurus II by Grady Ward, 1.0:

158 Moby Thesaurus words for "mobilize":
   accouple, accumulate, activate, actuate, agglomerate, agglutinate,
   aggregate, aggroup, amass, arrange, articulate, assemble,
   associate, band, batch, beat the drums, bond, bracket, bridge,
   bridge over, bring together, bulk, bunch, bunch together, bunch up,
   call to arms, call up, cement, chain, circulate, clap together,
   clear for action, clear the decks, clump, cluster, collect,
   colligate, collocate, combine, commandeer, compare, compile,
   comprise, concatenate, conglobulate, conglomerate, conjoin,
   conjugate, connect, conscript, copulate, corral, couple, cover,
   cumulate, cure, deploy, detach, detach for service, dig up, draft,
   draw together, dredge up, dress, drive, drive together, embrace,
   encompass, enlist, enroll, fix, fix up, gather, gather in,
   gather together, get in, get ready, get together, glue, group,
   impel, impress, include, induct, join, juxtapose, knot,
   lay together, league, levy, link, list, lump together,
   make arrangements, make preparations, make ready, make up, marry,
   marshal, mass, match, merge, motivate, move, muster, muster in,
   nudge, organize, pair, partner, piece together, plan, prearrange,
   prep, prepare, press, pretreat, process, propel, provide, push,
   put in shape, put together, raise, rake up, rally, reactivate,
   ready, ready up, recruit, remilitarize, roll into one, round up,
   scrape together, set in motion, set off, settle preliminaries,
   shove, sign on, sign up, solder, span, splice, stick together,
   summon, take in, take up, tan, tape, tie, treat, trim, try out,
   unify, unite, weld, whip in, yoke