Chaise Longue (Europe) / Chaise Lounge (USA)
Try divan.
divan
A backless sofa is called a chaise lounge. It typically resembles a sofa, but has no back, and only one arm.
ottoman
stool
A sofa is an English word.
In French, "sofa" is a masculine word. The article "le" is used before sofa.
The plural word for sofa is sofas.
A backless slipper is called a mule.
Backless was created in 1978-11.
The word "sofa" is derived from the Arabic word "ṣuffa," which referred to a raised seating platform with cushions. This term was adopted into various European languages before becoming "sofa" in English.
Yes, sofa is a noun, a singular, common, concrete noun. A noun is a naming word and the word 'sofa' names a thing.