Words that start with 'der' and contain 'a'

Which word from this list has the highest character count?
The largest word is 19 characters, which is 'dermatoheteroplasty'.

What's the highest scoring word you can play in Scrabble ?
With an extensive 240 entries, we'd advise choosing 'derbukka' scoring 19 points overall.

What's the maximum number of words you can construct from this list?
From this page of words that start with 'der' and contain 'a', you have 240 effective combinations that can be selected.

Is there any word on this page that stands out as the most common?
We've discovered that 'derivative' is the 3896^th most common word.

What is the most unique word that starts with 'der' and includes 'a'?
Certainly one of the most weird words from this list is 'deray'. The dictionary defines it as "Disorder; merriment. [Obs.]".