The difference between Accelerate and Quicken

When used as verbs, accelerate means to cause to move faster, whereas quicken means to give life to.

Accelerate is also adjective with the meaning: accelerated.

Quicken is also noun with the meaning: the european rowan, sorbus aucuparia.

check bellow for the other definitions of Accelerate and Quicken

Accelerate as a verb (transitive):

To cause to move faster; to quicken the motion of; to add to the speed of.
Accelerate as a verb (transitive):

To quicken the natural or ordinary progression or process of.

Examples:

"to accelerate the growth of a plant, the increase of wealth, etc."
Accelerate as a verb (transitive, physics):

To cause a change of velocity.
Accelerate as a verb (transitive):

To hasten, as the occurrence of an event.

Examples:

"to accelerate our departure"
Accelerate as a verb (transitive, education):

To enable a student to finish a course of study in less than normal time.
Accelerate as a verb (intransitive):

To become faster; to begin to move more quickly.
Accelerate as a verb (intransitive):

Grow; increase.
Accelerate as a verb (obsolete):

Accelerate as an adjective (rare):

Accelerated; quickened; hastened; hurried.

Quicken as a verb (transitive, now, _, literary):

To give life to; to animate, make alive, revive.
Quicken as a verb (intransitive, now, _, literary):

To come back to life, receive life.
Quicken as a verb (intransitive):

To take on a state of activity or vigour comparable to life; to be roused, excited.
Quicken as a verb (intransitive):

Of a pregnant woman: to first feel the movements of the foetus, or reach the stage of pregnancy at which this takes place; of a foetus: to begin to move.
Quicken as a verb (transitive):

To make quicker; to hasten, speed up.
Quicken as a verb (intransitive):

To become faster.

Examples:

"My heartbeat quickened when I heard him approach."
Quicken as a verb (shipbuilding):

To shorten the radius of (a curve); to make (a curve) sharper.

Examples:

"to quicken the sheer, that is, to make its curve more pronounced"

Quicken as a noun (now, _, chiefly, Northern England):

The European rowan, Sorbus aucuparia.