Malfunction is a term used to describe a problem with a machine or system, usually caused by an error or defect. A BUG is a 3-letter term for a small error or defect in a computer program. A FLAW is a 4-letter term for a mistake or imperfection in something. A FAULT is a 5-letter term for a mistake or error in a plan or system. A BREAKDOWN is a 9-letter term for a sudden FAILURE or stoppage. A FAILURE is a 7-letter term for an inability to perform a task or function. A GLITCH is a 6-letter term for a minor problem or malfunction. A JAM is a 3-letter term for a situation in which something becomes stuck or blocked. A BREAK is a 5-letter term for a pause or interruption. Actup is a 5-letter term for to behave badly or misbehave. Go haywire is a 9-letter term for to become uncontrollable or chaotic.