DDT

DDU

DDT = Dichlorodiphenyltrichloroethane = a really bad insecticide

DDV

DDW

DDX

DDY

DDZ

DAR

I think you forgot to go the last page friend!

The letters we're on atm are DEA

DEB

DEC

Deb is a name
Dec is the abbreviation for December

DED is .. nothing xD

DED means you're dead inside.

DEE

is the name of a character in It's Always Sunny in Philadelphia

DEF (inition)

ded is rather depressing x'D
I've never watched it, but it's a pretty sunny name.

DEG

DEH