Collocations for jaw - noun

bottom, lower
top, upper
firm, strong
clenched, set
slack
jutting, lantern (= in which the lower part sticks out)
square
broken, dislocated, fractured

clench, set, tighten (AmE)
work (AmE)
She worked her lower jaw back and forth.

drop
She dropped her jaw in astonishment.

rub
He rubbed his sore jaw.

break, dislocate, fracture

drop, hang, hang open
My jaw dropped in astonishment when I saw the size of the audience.

be set, clench, set, tighten
Her jaw was set, ready for a fight.

jut
His jaw jutted stubbornly forward; he would not be denied.

bone, muscle

in your jaw
A muscle in his jaw pulsed angrily.

on your jaw
He had two days' growth of stubble on his jaw.

to the jaw
a punch to the jaw

under your jaw
She had a fold of flesh under her jaw.

the line of your jaw, the set of your jaw
The stern set of the officer's jaw made Tony realize he was in trouble.

gaping, open
massive, powerful
A shark can crush a boat with its massive jaws.

clamp, close, lock, sink
The dog locked its jaws on her leg and wouldn't let go.
A spider sank its jaws into my ankle.

open
Pythons open their jaws wide to swallow their prey whole.

snap
The animal's jaws snapped shut.

escape, escape from
The antelope could not escape the crocodile's gaping jaws.

between its jaws
The dog had his arm clamped between its jaws.