Collocations for sofa - noun

battered
comfortable, comfy (informal), plush, soft
overstuffed
Amy collapsed on her overstuffed leather sofa.

deep, low-slung (AmE)
She sank into the deep sofa.

chintz, leather, etc.
three-seater, two-seater, etc.
convertible, sleeper (AmE)
The convertible sofa means that the apartment can sleep four.

living-room
I was lying on my living-room sofa.

collapse on/onto, flop (down) on/onto, settle (down) on, sink (down) into/on/onto, sit (down) on, slump (down) on/onto
He slumped back on the sofa in tears.

be sprawled (out) on, lie on, lounge on, recline on, stretch out on
I spent the evening sprawled on the sofa, watching TV.

get up from, jump up from, rise from
He got up from the sofa to fetch some drinks.

hide behind
I might have to hide behind the sofa if the movie gets too scary!

bed
cushion

on the sofa
She was curled up on the sofa.
I fell asleep on the sofa.
I don't mind sleeping on the sofa.

the arm of a/the sofa, the back of a/the sofa, the edge of a/the sofa, the side of a/the sofa