Cases of word usage

1) a small stream (brook)

2) (made of) a kind of hard, black, highly polished mineral; fast, strong stream (of gas, liquid, steam or flame) forced out of a small opening (jet)

3) (to cause a liquid or a substance like a liquid) to flow in a continuous stream (pour)

4) a small stream (rivulet)

5) a pipe from which liquid pours, e.g. for tea from a teapot; a stream of liquid coming out with great force (spout)

6) a thin stream (of liquid, powder etc); an unimportant, nasty person; to force (liquid, powder etc) onto (a person, thing) in a thin stream or jet (squirt)

7) a small, weak flow (of a liquid); to flow in small drops or in a thin stream (trickle)

8) (moving) in the opposite direction to the stream or current (upstream)

9) a (usually long) tuneful sound made by forcing air or stream through a small opening (e.g. the mouth, a bird's beak) or made by the wind; a simple instrument making a similar sound as used by a referee in games and sports (whistle)