Combustion vs Fired - What's the difference?

As a noun combustion

is combustion.

let go from a job.

(fire).

(wikipedia combustion)

(en noun)

(chemistry) The act or process of burning.

A process where two chemicals are combined to produce heat.

A process wherein a fuel is combined with oxygen, usually at high temperature, releasing heat.

(figuratively) Violent agitation, tumult.

* Mede

There [were] great combustions and divisions among the heads of the university.

* Dryden

But say from whence this new combustion springs.

* (act or process of burning) incineration, cremation

* deflagration * detonation

(head)

let go from a job

(head)

(fire)