WordNet (r) 3.0 (2006):

stand up
    v 1: rise to one's feet; "The audience got up and applauded"
         [syn: arise, rise, uprise, get up, stand up]
         [ant: lie, lie down, sit, sit down]
    2: refuse to back down; remain solid under criticism or attack
    3: put into an upright position; "Can you stand the bookshelf
       up?" [syn: stand, stand up, place upright]
    4: be standing; be upright; "We had to stand for the entire
       performance!" [syn: stand, stand up] [ant: lie, sit,
       sit down]
    5: 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]
    6: resist or withstand wear, criticism, etc.; "Her shoes won't
       hold up"; "This theory won't hold water" [syn: stand up,
       hold up, hold water]
    7: rise up as in fear; "The dog's fur bristled"; "It was a sight
       to make one's hair uprise!" [syn: bristle, uprise, stand
       up]

Moby Thesaurus II by Grady Ward, 1.0:

145 Moby Thesaurus words for "stand up":
   answer, arise, ascend, avail, be consistent, be equal to, be erect,
   be proof against, be the case, be true, be truthful, bear, bear up,
   bear up against, bristle, cock up, come up, come up fighting,
   conform to fact, curl upwards, defy, disentangle, do, do it,
   endure, extend, fill the bill, flatten, fulfill, get by, get up,
   go around, go up, grow up, hack it, hang in, hang in there,
   hang on, hang tough, hold, hold fast, hold good, hold on, hold out,
   hold together, hold true, hold up, hold water, jump up, just do,
   keep up, levitate, live through it, live with it, loom,
   make the grade, meet, meet requirements, mount, never say die,
   not flag, not give up, not weaken, pass, pass muster, prove out,
   prove to be, prove true, put straight, qualify, raised, ramp,
   reach, rear, rear up, rebuff, rectify, remain valid, repel,
   repulse, resist, rise, rise up, satisfy, see it out, serve,
   serve the purpose, set straight, sit bolt upright, sit up, smooth,
   spiral, spire, stand, stand at attention, stand at ease,
   stand erect, stand the test, stand up straight, stand upright,
   stay it out, stay the distance, stay with it, stick, stick it,
   stick it out, stick out, stick to it, stick together, stick up,
   stick with it, straight-up, straighten, straighten out,
   straighten up, stretch, suffice, surge, swarm up, sweat it out,
   sweep up, take it, tough it out, tower, unbend, uncurl, unkink,
   unsnarl, up, upgo, upgrow, upheave, uprear, upright, uprise,
   upspin, upspring, upstanding, upstream, upsurge, upswarm, upwind,
   wash, withstand, work