Coupler vs. Coupling: What's the Difference?

Coupler and Coupling Definitions
Coupler
One that couples, especially a device for coupling two railroad cars.
Coupling
The act of linking together or forming couples.
Coupler
A device connecting two organ keyboards so that they may be played together.
Coupling
The act of uniting sexually.
Coupler
Someone who couples things together, especially someone whose job it is to couple railway carriages.
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Coupling
A device that links or connects.
Coupler
Anything that serves to couple things together; but especially a device that couples railway carriages.
Coupling
(Electronics) The transfer of electricity from one circuit to another.
Coupler
(music) A device that connects two keyboards of an organ together so that they play together.
Coupling
(Chemistry) Facilitation or acceleration of one chemical process due to the presence or action of another.
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Coupler
A device used to convert electronic information into audible sound signals for transmission over telephone lines.
Coupling
The body part of a four-footed animal that connects the hindquarters to the forequarters.
Coupler
An electrical device used to transfer energy from one electric device to another, especially without a physical connection.
Coupling
Act of joining together to form a couple.
Coupler
One who couples; that which couples, as a link, ring, or shackle, to connect cars.
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Coupling
A device that couples two things together.
Coupler
A mechanical device that serves to connect the ends of adjacent objects
Coupling
(software engineering) The degree of reliance between two or more software modules.
Coupling
(electronics) A connection between two electronic circuits such that a signal can pass between them.
Coupling
(physics) The property of physical systems that they are interacting with each other
Coupling
(sexuality) Sexual intercourse.
Coupling
Present participle of couple
Coupling
The act of bringing or coming together; connection; sexual union.
Coupling
A device or contrivance which serves to couple or connect adjacent parts or objects; as, a belt coupling, which connects the ends of a belt; a car coupling, which connects the cars in a train; a shaft coupling, which connects the ends of shafts.
Coupling
A connection (like a clamp or vise) between two things so they move together
Coupling
A mechanical device that serves to connect the ends of adjacent objects
Coupling
The act of pairing a male and female for reproductive purposes;
The casual couplings of adolescents
The mating of some species occurs only in the spring