Collocations for underground - noun
ADJ.
London
VERB + UNDERGROUND
go on/by, take, travel on/by
UNDERGROUND + NOUN
station, train, tunnel | system
bringing the whole underground system to a halt
bringing the whole underground system to a halt
PREP.
in the ~
I always seem to get lost in the underground.
I always seem to get lost in the underground.
on the ~
passengers on the underground
passengers on the underground