ADV

heavily, a lot, strongly
countries that rely heavily on food aid
entirely, exclusively, solely
increasingly
largely, mainly
traditionally

VERB + RELY

be forced to, have to, must
people who are forced to rely on public transport
tend to

PREP

for
They relied entirely on these few weapons for their defence

ADV

safely
You can safely rely on his judgement
simply
Most historians simply rely on archives

VERB + RELY

can/could
can/could always
can/could no longer
The party could no longer rely on its traditional supporters

PREP

for
I couldn't rely on John for information