Creak

Noun

 * 1) The sound produced by anything that creaks; a creaking.

Verb

 * 1)  To make a prolonged sharp grating or squeaking sound, as by the friction of hard substances.
 * 2)  To produce a creaking sound with.

Adverbs for Creak
stridently; irritatingly; monotonously; continually; disturbingly; intermittently; rhythmically.

Thesaurus
caterwaul, chirk, chirking, chirp, chirrup, crick, howl, keen, pipe, screak, scream, screech, shriek, shrill, skirl, skreigh, squawk, squeak, squeal, stridulate, stridulation, ululate, ululation, wail, whine, whistle, wrawl, yammer