That is alot temp files. See
http://support.microsoft.com/?kbid=211632
"Description of how Word creates temporary files" for a list temporary
Word files that can be safely deleted, because Word should have deleted
those automatically when you closed the related Word document or when
you exited Word. You can also delete .doc and .dot files with filenames
that begin with ~$ , because those are leftover "owner" files that Word
should have deleted automatically.