epic, great, life-and-death, titanic
bitter, desperate, fierce, heroic, violent
There were the sounds of a desperate struggle.

continuing, ongoing
protracted
unequal (esp. BrE)
armed
The group supported the armed struggle against the dictator.

class, internecine
Marx wrote about the class struggle.

inner, internal
The author illustrates the inner struggles of this complicated woman.
The party is locked in an internal struggle.

economic, ideological, leadership, liberation, political, power, revolutionary

begin, end
join, take up
They took up the struggle against racism.

carry on, wage
be engaged in, be locked in
species engaged in a life-or-death struggle with the environment

lead
lose, win
put up
If someone snatched your bag, would you put up a struggle?

ensue, take place
continue, go on
intensify

in a/the struggle
One of the guards was hurt in the struggle.

without a struggle
She won't give up without a struggle.

struggle against
the struggle against oppression

struggle between
the struggle between good and evil

struggle for
the long struggle for democracy

struggle over
a struggle over the property

struggle with
He was involved in a struggle with the police.

a sign of a struggle
The police said that there was no sign of a struggle by the murder victim.

years of struggle
After 150 years of struggle against colonial rule, the country won its independence.

great, hard, real, uphill
It will be an uphill struggle to maintain exports at the current level.

long
ceaseless, constant, daily, endless
the daily struggle for survival

face, have
We had a real struggle to get everything into the suitcase.

give up
I've given up the struggle to keep my house clean.

a bit of a struggle
It was a bit of a struggle for me to get there so early.

desperately, hard, manfully, mightily (esp. AmE), painfully, valiantly
He struggled desperately to get to the shore.
He struggled hard to keep the boat upright.

a little
constantly
on
She struggled on despite the pain.

have to

against
The small boat struggled against the waves.

along, down, up
They struggled up the hill.

for
Shona struggled for breath.

through
The family struggled through the next few years.

struggle to your feet
She struggled to her feet and set off after him.

badly
The team struggled badly last season.

really
He was really struggling in geometry.

clearly, obviously
financially
I was unemployed and struggling financially.

defensively (esp. AmE), offensively (AmE)

through, with
I'm really struggling with this essay.

struggle to make ends meet
For years, she struggled to make ends meet.

fiercely, furiously, violently
She struggled furiously but could not get away.

together
Ben and Jack struggled together on the grass.

against
She struggled against her attacker.

with
He was hit in the mouth as he struggled with the raiders.

struggle free
The attacker's victim managed to struggle free.

Struggle is used with these nouns as the subject:
country, economy, industry, side