ADJ

long
narrow
hard
padded
wooden
garden, park
replacements', subs', substitutes' (sport)
They have several top players on the subs' bench

VERB + BENCH

sit (down) on

BENCH + NOUN

seat

PREP

on a/the ~
He often sleeps on park benches

ADJ

government, Opposition
Conservative, Labour, etc.
back, front (Government ministers and the most important members of the Opposition sit on the front benches. Back-bench MPs have no official position besides that of MP.)

VERB + BENCH

be on, sit on

PREP

from the … ~s
There were cheers from the Labour benches
on the … ~s
Some MPs on the government back benches are starting to question the government's handling of the war

ADJ

work (also workbench)
carpenter's, laboratory

PREP

at a/the ~
He was working at his bench