Invigilate vs Investigate - What's the difference?

In lang=en terms the difference between invigilate and investigate

is that invigilate is to oversee a test or exam while investigate is to conduct an inquiry or examination.

is that invigilate is to oversee a test or exam while investigate is to inquire into or study in order to ascertain facts or information.

(en-verb)

To oversee a test or exam.

Professor Burns will be invigilating over the final examinations to ensure that the students do not cheat.

* invigilation * invigilator

(investigat)

To inquire into or study in order to ascertain facts or information.

to investigate the causes of natural phenomena

To examine, look into, or scrutinize in order to discover something hidden or secret.

to investigate an unsolved murder

To conduct an inquiry or examination.

* 1903 , , "The Shadow and the Flash,"

"Why don't you investigate'?" he demanded. And ' investigate I did.

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