@Lightbrite
Sideboards, Buffets, Servers, Consoles are made to stand against a wall and unfinished on the rear. They do not have storage above the counter level (usually not taller than 41″
A wall unit is not finished on the rear and is placed back to the wall,
An Etagere is finished on all sides and is often used freestanding as a room divider
In addition to sofa, couch and Chesterfield, is Divan and Chaise Longue (long, not lounge).
Shorter couches (2 places) may be called Settees or Love Seats