Words that start with 'add' and contain 'd'

What's the maximum number of words one is able to create from this combination of letters?
You can choose from 24 words which address your query.

In Scrabble, what's the highest number of points possible using words that start with 'add' and contain 'd'?
From this particular combination, the best word to play is 'addebted' which scores 13 points.

What's the most common word for this page?
Rating as the 609^th most popular word, you'll want to make sure you've got 'added' memorized.

What's a peculiar word from all the combinations possible ?
Our team feels 'addendum' to be the most peculiar word you can construct. 'Addendum''s definition is "A thing to be added; an appendix or addition. Addendum circle (Mech.), the circle which may be described around a circular spur wheel or gear wheel, touching the crests or tips of the teeth. Rankine.", according to the English dictionary.

What is the longest word you can derive using this list?
There are 15 characters in the word 'addleheadedness', that makes it the longest word Dictionarypedia has.