Rearrange this!

Look at these words. Take a look at what I rearraged them to.

DORMITORY to
DIRTY ROOM




THE EYES to
THEY SEE




PRESBYTERIAN to
BEST IN PRAYER




ELEVEN PLUS TWO to
TWELVE PLUS ONE

Think of a word such that when read backwards, it will be another valid word. e.g. SAW, read backwards--WAS. Think of the longest word. My longest word is REWARD. Can anyone think of a longer one?