Burnout vs Overwhelm - What's the difference?

As a noun burnout

is using the throttle to spin the wheels of a vehicle being held stationary, causing the spinning tires to produce smoke and burn rubber.

to engulf, surge over and submerge.

(en noun)

Using the throttle to spin the wheels of a vehicle being held stationary, causing the spinning tires to produce smoke and burn rubber.

(US, slang) A marijuana addict; one whose brains have been burned out.

(psychology) The experience of long-term exhaustion and diminished interest, especially in one's career.

To engulf, surge over and submerge.

The dinghy was overwhelmed by the great wave.

To overpower, crush.

In December 1939 the Soviet Union attacked Finland with overwhelming force.

* Bible, Psalms lxxviii. 53

The sea overwhelmed their enemies.

To overpower emotionally.

He was overwhelmed with guilt.

Joy overwhelmed her when she realized that she had won a million dollars.

To cause to surround, to cover.

(Papin)

* overwhelming