15-Letter Words Matching D__________A___

There are 18 15-letter words that match D__________A___. 5 are common words, such as DEMOGRAPHICALLY and DEVELOPMENTALLY. A rarer one is DYSLOGISTICALLY. In this set, I is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 18

demographicallydevelopmentallydiscombobulateddiscombobulatesdistinguishabledimenhydrinatesdinoflagellatesdistinguishablydolichocephalicdramaturgicallydysfunctionallydiastrophicallydichloroethanesdisaccharidasesdisequilibrateddisequilibratesdithyrambicallydyslogistically

About this list

Words
18 (5 common words)
Common example
demographically
Rare example
dyslogistically
Doubled letters
9
Ending in S
6
Most frequent letter
I (17)

Questions

How many 15-letter words matching d__________a___ are there?

18. 5 of them are common words.

What is a common example?

DEMOGRAPHICALLY is among the common words in this set.