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.
'Catastrophe' has four syllables.
The earthquake in China was a major catastrophe.
Hijacking Catastrophe was created in 2004.
Catastrophe - book - was created in 2009.
Family Catastrophe was created in 1972.
Causing a Catastrophe was created in 2002.
Nedelin catastrophe happened in 1960.
The Ultraviolet Catastrophe was created in 1998.