From the Writebacks for Sense and Sensibility

Here.

Sid Cundiff wrote
a motion to stike and substituteMr. Speaker, I respectfully move to strike "tragedy" and substitute "calamity".

which led to this response by Dr. Fleming:

Thomas Fleming wrote
Calamity is very good. It is an intelligble Latin word (calamitas) with a root in a word suggesting harm or damage (hence the common incolumis, safe, undamaged). Calamity is often used of natural disasters and, in Latin at least, of military setbacks or simple failure. There is no moral confusion. A hailstorm that destroys the grain is a calamity, so is a military defeat and a massacre.