The difference between Auto and Motor
When used as nouns, auto means an automobile, whereas motor means a machine or device that converts any form of energy into mechanical energy, or imparts motion.
When used as adjectives, auto means automatic, whereas motor means relating to the ability to move.
Motor is also verb with the meaning: to make a journey by motor vehicle.
check bellow for the other definitions of Auto and Motor
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Auto as an adjective:
automatic
Examples:
"It's an auto sedan which we picked up from a wholesaler locally."
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Auto as a noun (chiefly, [[attributive]]ly):
An automobile.
Examples:
"My brother is an auto mechanic."
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Auto as a noun:
A setting for automatic operation.
Examples:
"Put it on auto."
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Auto as a noun:
A writ.
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Auto as a noun:
An automatic gearbox / transmission.
Examples:
"A body coloured centre pillar signalled the arrival of an electronic four-speed auto, slight suspension revisions and minor trim changes."
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Auto as a noun:
A car with an automatic gearbox / transmission.
Examples:
"It wasn't too bad but we did hire an auto (couldn't imagine changing gears with my right hand)."
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Auto as a noun (India):
An autorickshaw.
Examples:
"... users are often unable to note down the number of the taxi or the auto as the driver will just zoom past."
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Motor as a noun:
A machine or device that converts any form of energy into mechanical energy, or imparts motion.
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Motor as a noun (colloquial):
A motor car, or automobile.
Examples:
"Nice motor!"
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Motor as a noun (figuratively):
A source of power for something; an inspiration; a driving force.
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Motor as a noun:
Any protein capable of converting chemical energy into mechanical work.
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Motor as a noun (Christianity, archaic, poetic):
The controller or prime mover of the universe; God.
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Motor as a noun (prison, _, slang):
The fermenting mass of fruit that is the basis of pruno, or "prison wine".
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Motor as an adjective (biology):
relating to the ability to move
Examples:
"She has excellent motor skills."
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Motor as an adjective:
Relating to motor cars
Examples:
"'Motor insurance is expensive for youngsters."
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Motor as a verb (dated):
To make a journey by motor vehicle; to drive.
Examples:
"On Saturday we motored down to Plymouth."
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Motor as a verb (informal):
To move at a brisk pace.
Examples:
"Sales were slow at first, but now things are really motoring."
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Motor as a verb (slang):
To leave.
Examples:
"I gotta motor."