commercial
coal, fish, etc.
boat, ferry, shipping (all esp. AmE)
fishing (AmE)

build, construct
arrive at, arrive in
enter
leave

company
strike
worker

at a/the dock
A car pulled up at the dock.

in dock
The ship is in dock for repairs.

on a/the dock
the cargo stacked on the dock

enter, go into, step into
appear in, be in
She was in the dock on charges of attempted fraud.

from the dock
an outburst from the dock

in the dock
The defendant stood in the dock.