In Greek, anastrophe means “turning back.” 
A u-turn. 
A return. 
A point of reversal.

In English, anastrophe slips into grammar. 
An inversion of the usual order of words or clauses. 

From subject-verb-object to object-verb-subject. 
The meaning stays—but our attention shifts
to what has been displaced. 

A catastrophe, by contract, is a collapse. 
A violent shift in the physical order of things. 
An ending of a set of conditions.

We pay attention to catastrophes, 
we read tham as events that are final. 
After them, we live in materially changed environments.