The Collaborative International Dictionary of English v.0.48:

Screak \Screak\ (skr[=e]k), v. i. [imp. & p. p. Screaked
   (skr[=e]kt); p. pr. & vb. n. Screaking.] [Cf. Icel.
   skraekja to screech. Cf. Creak, v., Screech.]
   To utter suddenly a sharp, shrill sound; to screech; to
   creak, as a door or wheel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Screak \Screak\, n.
   A creaking; a screech; a shriek. --Bp. Bull.
   [1913 Webster]

WordNet (r) 3.0 (2006):

screak
    v 1: make a high-pitched, screeching noise; "The door creaked
         when I opened it slowly"; "My car engine makes a whining
         noise" [syn: whine, squeak, screech, creak,
         screak, skreak]
    2: utter a harsh abrupt scream [syn: squawk, screak,
       skreak, skreigh, screech]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "screak":
   bark, bawl, bay, bell, bellow, blare, blat, blate, bleat, bray,
   call, caterwaul, creak, cry, give tongue, give voice, howl, keen,
   low, meow, mew, mewl, miaow, moo, neigh, nicker, pipe, pule, roar,
   scream, screech, shriek, shrill, skirl, skreigh, squall, squawk,
   squeak, squeal, troat, ululate, ululation, wail, whicker, whine,
   whinny, whistle, wrawl, yammer, yap, yawl, yawp, yelp, yip, yowl