[1] : WordNet (r) 2.0

stir up
     v 1: try to stir up public opinion syn: agitate, foment
     2: arouse or excite feelings and passions; "the ostentatious
        way of living of the rich ignites the hatred of the poor";
        "the refugees' fate stirred up compassion around the
        world"; "wake old feelings of hatred" syn: inflame, wake,
         ignite, heat, fire up
     3: change the arrangement or position of syn: agitate, vex,
         disturb, commove, shake up, raise up
     4: provoke or stir up; "incite a riot"; "set off great unrest
        among the people" syn: incite, instigate, set off
see also:
agitate foment inflame wake ignite heat 
fire up vex disturb commove shake up 
raise up incite instigate set off 

[2] : Moby Thesaurus II by Grady Ward, 1.0

148 moby thesaurus words for "stir up":
   abet, admix, aggravate, agitate, alloy, amalgamate, annoy, arouse,
   awake, awaken, beat, beat up, bemingle, blend, blow the coals,
   blow up, bristle, call forth, call up, chafe, churn, churn up,
   coalesce, combine, commingle, commix, compose, compound, concoct,
   conglomerate, convulse, disarrange, discompose, disquiet, disturb,
   embitter, emulsify, enkindle, enrage, exasperate, excite, fan,
   fan the fire, fan the flame, feed the fire, ferment, fire, flame,
   flurry, foment, frenzy, fret, fuse, hash, heat, heat up,
   homogenize, huff, immingle, immix, impassion, incense, incite,
   inflame, infuriate, instigate, integrate, interblend, interlace,
   interlard, intermingle, intermix, intertwine, interweave, irritate,
   jumble, key up, kindle, knead, lather up, light the fuse, light up,
   madden, merge, miff, mingle, mingle-mangle, mix, mix up, move,
   nettle, overexcite, paddle, peeve, perturb, perturbate, pique,
   provoke, put up to, raise, raise up, rally, rankle, rile, ripple,
   roil, roughen, rouse, ruffle, rumple, scramble, set, set astir,
   set fire to, set on, set on fire, set up, shake, shake up, shuffle,
   sic on, steam up, stir, stir the blood, stir the embers,
   stir the feelings, summon up, swirl, syncretize, throw together,
   tickle, toss together, trouble, turn on, upset, vex, wake, wake up,
   waken, warm, warm the blood, whet, whip, whip up, whisk, work,
   work into, work up

Ball Up >> B Words
Ball Up, definition of term: Ball Up
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Bang Up, definition of term: Bang Up
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Backed Up >> B Words
Backed Up, definition of term: Backed Up
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Back Up >> B Words
Back Up, definition of term: Back Up
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Ante Up >> A Words
Ante Up, definition of term: Ante Up
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Act Up >> A Words
Act Up, definition of term: Act Up
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