The plural is catastrophes but would be pronounced as "catastro-fees".
The plural of tragedy is tragedies.
The noun catastrophes is the plural form of the noun catastrophe, both are common nouns.
a huge catastrophe
No, catastrophe is a noun.
The earthquake in China was a major catastrophe.
'Catastrophe' has four syllables.
Catastrophe Ballet was created in 1984.
Traces of Catastrophe was created in 1998.
The Catastrophe of Success was created in 1947.
U-Catastrophe was created in 2007.
Family Catastrophe was created in 1972.
Causing a Catastrophe was created in 2002.