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Difference between error,failure,fault,bug,defect

Terms from the  ISTQB Glossary.

error/mistake: A human action that produces an incorrect result.
Explanation:Program or environment tells you that do something wrong. Example 

fault/defect /bug/  defect.: A flaw in a component or system that can cause the component or system to fail to ATM perform its required function, e.g. an incorrect statement or data definition. A defect, if
encountered during execution, may cause a failure of the component or system.
Explanation: Is a defect within the system (Somewhere hidden in the code and maybe never detected)

Failure: Deviation of the component or system from its expected delivery, service or result
Explanation: A failure occurs when the system fails to perform its required function. (System crash)
Example: