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]