cataclysm (n.)
- accident
- alluvion
- alluvium
- apoplexy
- blow
- breakdown
- breakup
- calamity
- casualty
- cataract
- catastrophe
- cave
- climax
- collapse
- collision
- contretemps
- convulsion
- counterrevolution
- crack-up
- crash
- debacle
- deluge
- diastrophism
- disaster
- fit
- flood
- flooding
- grief
- inundation
- misadventure
- mischance
- misfortune
- mishap
- overflow
- overthrow
- overturn
- paroxysm
- pileup
- pour
- quake
- revolt
- revolution
- revulsion
- shipwreck
- shock
- smash
- spasm
- spate
- spill
- spillage
- stroke
- submersion
- subversion
- temblor
- torrent
- tragedy
- tsunami
- upheaval
- upset
- washout
- wrack
- wreck
