WordNet (r) 3.0 (2006):

stick up
    v 1: rob at gunpoint or by means of some other threat [syn:
         hold up, stick up]
    2: defend against attack or criticism; "He stood up for his
       friend"; "She stuck up for the teacher who was accused of
       harassing the student" [syn: stand up, stick up]

Moby Thesaurus II by Grady Ward, 1.0:

75 Moby Thesaurus words for "stick up":
   arise, boost, bristle, bristle up, buoy up, cast up, cock up,
   commit robbery, elevate, erect, escalate, extrude, get up, heave,
   heft, heighten, heist, hijack, hike, hoick, hoist, hold up,
   jerk up, jump up, jut out, knock off, knock over, knock up,
   levitate, lift, lift up, lob, loft, loot, mug, perk up, plunder,
   poke out, project, protrude, protuberate, raise, raise up, ramp,
   ransack, rear, rear up, relieve, rifle, rip off, rise, rise up,
   rob, set up, shoot out, shoot up, sit bolt upright, sit up, sky,
   stand out, stand up, start up, stick out, throw up, up, upbuoy,
   upcast, upheave, uphoist, uphold, uplift, upraise, uprear, uprise,
   upthrow