First attest early 15th. century, from Middle French calamite' (14th. century), from Latin calamitatem(nominative calamitas) "damage, loss, failure; disaster, misfortune, adversity,"
The tsunami caused great calamity
The root word of calamity is "calamitas," which comes from Latin and means "disaster" or "misfortune."
The English word "calamity" comes from Latin calamitas.
disaster
kuh-lam-i-tee
disaster
calamity
The word for a cataclysm or calamity is "disaster".
Disaster
That word would be disaster.
A disaster, like a calamity is a hugely problematic turn of events.
One option is the word disaster.