angry, strong, violent | peaceful | sit-down | mass | formal, official | popular, public, student | anti-government, political | continuing, further, renewed | rooftop, street
a rooftop protest by prison inmates

widespread

flood, storm, tide, wave
The new tax sparked a wave of public protest.

organize, stage | lodge, register
The Samoan team lodged a formal protest after the referee sent off the wrong player.

lead to, spark

group, movement | demonstration, march, meeting, rally | strike | petition | song

in ~
Prisoners shouted and hurled slates in protest.

under ~
The strikers returned to work, but under protest.

without ~
The crowd dispersed without protest.

~ about
a protest about the new bypass

~ against
There had been a number of public protests against the new tax.

~ at
The party boycotted the election in protest at alleged vote rigging.

~ over
a student protest over tuition fees

a chorus/cry/howl of protest
The announcement brought cries of protest from the crowd.

the freedom/right of protest
The constitution guarantees the right of peaceful protest.

a letter of protest

strongly, vehemently, vigorously | formally | loudly | mildly | weakly | peacefully
the right to protest peacefully

bitterly, desperately, indignantly

begin to, try to
When he tried to protest, she insisted.

gather to
Crowds gathered to protest about the police violence.

about/over
protesting over an income tax increase

against
protesting against the proposed agreement

at
Many people have protested at the cuts in state benefits.

to
We have protested to the government.