John W. wrote:

> 
> "Sorrowing families arrived at a gymnasium that has been turned into a
> make-shift morgue to claim the bodies of the dead."
> 
> Sorrowing? I'm not sure I've ever heard that word used that way.
> 

It's meaning is obvious so of course it's a word. However the 
past tense is usually frowned upon, sorrowing is OK but sorrowed 
isn't.

In Sepponia any word can take any part of a sentence. Verbs can 
be nounified and verberization of nouns is quite common. Nouns 
can be used adverbily and recently it's use is adjective.

"Winningest" is a particular favourite, although I've never heard 
it said, "dehostilification" is another.