Collocations for corruption - noun

gross, massive, serious | petty | endemic, rampant, rife, widespread
Corruption was rife before the election.

high-level | alleged | financial, moral, political | official | government, police

case

attack, combat, curb, eliminate, fight, root out, stem, tackle
He strongly attacked corruption and favouritism in the government. | This police unit was established to fight corruption.

be involved in

scandal
She was brought down by a corruption scandal.

allegation
The corruption allegations proved false.

investigation

~ among
corruption among high-ranking government officials

accusations/allegations of corruption, bribery and corruption