Mammoth Uncensored Word List:
62 - 4 letter words starting with do

doat dobs doby dock doco docs dodo dods doek doer does doff doge dogs dogy dohs dole doll dols dolt dome doms domy done dong dons doob dook dool doom door dope dopy dorb dork dorm dorp dorr dose dosh dote doth dots doty douc douk doum doun doup dour dout dove dowf dowl down dowp dows dowt doxy doys doze dozy