Sofa

(n.) A long seat, usually with a cushioned bottom, back, and ends; -- much used as a comfortable piece of furniture.

Thesaurus Entries

bed, bedstead, bunk, chesterfield, couch, davenport, day bed, divan, doss, gurney, kip, litter, lounge, love seat, ottoman, settee, settle, spoonholder, squab, stretcher, studio couch, tete-a-tete, the hay, the sack