Couch Sofa

Couch Sofa
what is the difference between a couch and a sofa?

I am doing some moving sale and try to sell my sofa/couch, but I am sure if it should be called sofa or couch in an ad. I live in Southern California.

A couch is very similar to a sofa. Derived from Middle French, a couch is an article of furniture for sitting or reclining. Sofa, taken from the Arabic suffah, is a long upholstered seat usually with arms and a back.

but i think sofa and a couch is just the same. It's just that, some people prefer to use the word couch.

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