cave in (n.)
- bowl
- breach
- break
- breakdown
- breakup
- cataclysm
- catastrophe
- cave
- collapse
- crack-up
- crash
- cup
- debacle
- decline
- deflation
- disaster
- dish
- droop
- drop
- fade
- faint
- flag
- flop
- fold
- founder
- hollow
- implosion
- lapse
- lower
- pine
- plop
- plump
- prostration
- puncture
- rupture
- sag
- set
- settle
- shipwreck
- sink
- slouch
- slump
- smash
- swag
- sway
- topple
- totter
- washout
- wilt
- wrack
- wreck
- yield
cave in (v.)
- bowl
- breach
- break
- cave
- collapse
- crash
- crumble
- cup
- decline
- deflate
- dish
- disintegrate
- droop
- drop
- fade
- fail
- faint
- flag
- flop
- flump
- fold
- founder
- hollow
- implode
- languish
- lapse
- lower
- pine
- plop
- plump
- puncture
- rupture
- sag
- set
- settle
- shipwreck
- sink
- slouch
- slump
- smash
- submerge
- subside
- succumb
- swag
- sway
- topple
- totter
- weaken
- wilt
- wrack
- wreck
- yield
