irregularity noun

ADJ. serious | minor, slight a slight irregularity in the surface of the wood | widespread The newspaper claimed there were widespread irregularities in the election. | electoral, financial, procedural, voting Investigators found no evidence of financial irregularity.

VERB + IRREGULARITY investigate, uncover

IRREGULARITY + VERB occur, take place Irregularities occur when there is no central control.

PREP. ~ in Auditors have uncovered serious irregularities in the accounts.