The Collaborative International Dictionary of English v.0.48:

Collide \Col*lide"\, v. i. [L. collidere, collisum; col- +
   laedere to strike. See Lesion.]
   To strike or dash against each other; to come into collision;
   to clash; as, the vessels collided; their interests collided.
   [1913 Webster]

         Across this space the attraction urges them. They
         collide, they recoil, they oscillate.    --Tyndall.
   [1913 Webster]

         No longer rocking and swaying, but clashing and
         colliding.                               --Carlyle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Collide \Col*lide"\, v. t.
   To strike or dash against. [Obs.]
   [1913 Webster]

         Scintillations are . . . inflammable effluencies from
         the bodies collided.                     --Sir T.
                                                  Browne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

collide
    v 1: be incompatible; be or come into conflict; "These colors
         clash" [syn: clash, jar, collide]
    2: cause to collide; "The physicists collided the particles"
    3: crash together with violent impact; "The cars collided"; "Two
       meteors clashed" [syn: collide, clash]

Moby Thesaurus II by Grady Ward, 1.0:

144 Moby Thesaurus words for "collide":
   agree to disagree, antagonize, atomize, bang, bang into, battle,
   be antipathetic, be at cross-purposes, be at variance, be inimical,
   beat against, box, brawl, break, break off, break up, broil, bump,
   bump into, cannon, carom, carom into, clash, close, combat,
   come into collision, come to blows, concuss, conflict,
   conflict with, confront each other, confute, contend, contest,
   contradict, contrapose, contravene, counter, counteract,
   counterattack, counterpose, countervail, counterwork, crack up,
   crash, crash into, cross, crump, crunch, cut and thrust, dash into,
   differ, differ in opinion, disaccord, disagree, dissent, duel,
   encounter, exchange blows, fall aboard, fall foul of, fence, feud,
   fight, fight a duel, foul, fragment, give and take,
   give satisfaction, go against, go counter to, grapple,
   grapple with, head into, hit, hit against, hold opposite views,
   hurt, hurtle, impinge, interfere with, jangle, jar, jostle, joust,
   knock, knock against, lock horns, meet, meet head-on,
   militate against, mismatch, mismate, misunderstand one another,
   mix it up, negate, not get along, object, oppose, oppugn, percuss,
   pull different ways, pulverize, quarrel, ram, rassle, resist, riot,
   run a tilt, run against, run broadside on, run counter to,
   run down, run in, run into, sail into, scramble, scrap, scuffle,
   shatter, sideswipe, skirmish, slam into, smack into, smash,
   smash into, smash up, spar, splinter, strike, strike against,
   strive, struggle, swim upstream, thrust and parry, tilt, tourney,
   tussle, vary, wage war, war, whomp, work against, wrestle