According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --D---B. That is, seven letter words with 3rd letter D and 7th letter B. In alphabetical order, they are:
pedicab
Brad
Cameron
Sandman (starts with S ends with N - 7 letter word)
The first one I thought of was 'Caesars'.
falloff
chaotic
Ability is a 7 letter word.
rotunda
yeshiva.
Hosanna
essence
Santana
undoing