For "Creak":
* Sound: groan, squeak, rattle, rasp, grind, screech, whine
* Movement: sway, wobble, sag, strain, buckle, give
* Feeling: uncomfortable, uneasy, uncertain, precarious, unstable
For "Brook":
* Stream: creek, rivulet, streamlet, run, rill, trickle, burn
* Body of Water: river, stream, watercourse, channel, conduit
* Tolerate: endure, abide, suffer, accept, put up with
Please provide more context if you need a more precise synonym. For example, are you talking about the sound a door makes, the movement of an old chair, or the flow of a small stream? Knowing the specific context will help me give you a more accurate answer.