Collapse
Subside
Synonyms Cave in, subside, sag, settle, give way, crumple, fall to pieces, fall in, fall down, slump, give, crumble, disintegrate, and come apart.
Swoon
Synonyms Faint, black out, fall unconscious, flake out, go out, pass out, lose consciousness, keel over, conk out, and swoon.
Fold
Synonyms Break down, fall through, founder, miscarry, come to nothing, be frustrated, not succeed, come to a halt, terminate, fizzle out, fail, fold, fall flat, go wrong, come to grief, be unsuccessful, disintegrate, end, flop, and flatline.
Subsidence
Synonyms Cave-in, subsidence, disintegration, giving way, and crumbling.
Failure
Synonyms Breakdown, disintegration, lack of success, end, failure, foundering, halt, and termination.
Seizure
Example Sentences
The building began to collapse suddenly.
He watched the tent collapse quietly.
They feared the bridge might collapse.
The economy could collapse without support.