What is the difference between sofa and couch?

Answer 1

There really isn't much of a difference between the two, other than the name.

Suggested answer:

There is one difference between a couch and a chair, usually. Most often, if a chair looked like a couch of the same design, a chair would have one cushion (usually) and a couch would have more. Also, almost always, a couch is much longer than a chair, depending on the general appearance of each.