The Collaborative International Dictionary of English v.0.48:

Scream \Scream\ (skr[=e]m), v. i. [imp. & p. p. Screamed
   (skr[=e]md); p. pr. & vb. n. Screaming.] [Icel. skraema to
   scare, terrify; akin to Sw. skr[aum]ma, Dan. skraemme. Cf.
   Screech.]
   To cry out with a shrill voice; to utter a sudden, sharp
   outcry, or shrill, loud cry, as in fright or extreme pain; to
   shriek; to screech.
   [1913 Webster]

         I heard the owl scream and the crickets cry. --Shak.
   [1913 Webster]

         And scream thyself as none e'er screamed before.
                                                  --Pope.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scream \Scream\, n.
   A sharp, shrill cry, uttered suddenly, as in terror or in
   pain; a shriek; a screech. "Screams of horror." --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scream
    n 1: sharp piercing cry; "her screaming attracted the neighbors"
         [syn: scream, screaming, shriek, shrieking,
         screech, screeching]
    2: a high-pitched noise resembling a human cry; "he ducked at
       the screechings of shells"; "he heard the scream of the
       brakes" [syn: screech, screeching, shriek, shrieking,
       scream, screaming]
    3: a joke that seems extremely funny [syn: belly laugh,
       sidesplitter, howler, thigh-slapper, scream, wow,
       riot]
    v 1: utter a sudden loud cry; "she cried with pain when the
         doctor inserted the needle"; "I yelled to her from the
         window but she couldn't hear me" [syn: shout, shout
         out, cry, call, yell, scream, holler, hollo,
         squall]
    2: utter or declare in a very loud voice; "You don't have to
       yell--I can hear you just fine" [syn: yell, scream]
    3: make a loud, piercing sound; "Fighter planes are screaming
       through the skies"

Moby Thesaurus II by Grady Ward, 1.0:

154 Moby Thesaurus words for "scream":
   bark, battle cry, bawl, bay, bell, bellow, belly laugh, blare,
   blat, blate, bleat, blubber, blue story, boom, bray, breathe, buzz,
   cackle, call, card, caterwaul, chant, cheer, chirp, complain, coo,
   creak, crow, cry, cry out, dirty joke, dirty story,
   dolorous tirade, double entendre, drawl, ethnic joke, exclaim,
   flute, fun, funny story, gag, gasp, give tongue, give voice,
   good one, good story, groan, growl, grumble, grunt, guffaw, hail,
   halloo, hiss, holler, hollo, hoot, howl, howler, hurrah, jape,
   jeremiad, jest, jestbook, joke, keen, lament, laugh, lilt, low,
   make an outcry, meow, mew, mewl, miaow, moan, moo, mumble, murmur,
   mutter, neigh, nicker, outcry, panic, pant, pipe, plaint, planctus,
   play, point, protest, pule, rallying cry, rib tickler, riot, roar,
   rumble, screak, screech, shout, shriek, shrill, sibilate,
   sick joke, sidesplitter, sigh, sight gag, sing, skirl, skreigh,
   snap, snarl, snort, sob, sough, sport, squall, squawk, squeak,
   squeal, story, thunder, tirade, troat, trumpet, twang, ululate,
   ululation, visual joke, wail, wail of woe, war cry, war whoop,
   warble, wheeze, whicker, whimper, whine, whinny, whisper, whistle,
   whoop, wow, wrawl, yammer, yap, yarn, yawl, yawp, yell, yelp, yip,
   yo-ho, yowl