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.
None No idea.
Couch is a synonym for sofa.
It's between the table and the couch/sofa.
IT IS A sofa ^^^^^^^
couch
a sofa
A couch (settee, sofa) is called 'un canapé' or 'un sofa' or 'un divan' in French.
Couch
Sofa.
Couch softly upholstered./
there isn't one because couch is another word for sofa
the couch