8-Letter Words Matching _____D_A

There are 16 8-letter words that match _____D_A. 1 are common words, such as PRESIDIA and CTENIDIA. A rarer one is TRIHEDRA. In this set, I is the most frequent open letter (13 words). 3 words contain a doubled letter.

Full list 16

presidiactenidiatamanduaanthodiacathedracoccidiacymbidiaepicediagammadiagerardiamazaediapalladiapycnidiastomodeasympodiatrihedra

About this list

Words
16 (1 common words)
Common example
presidia
Rare example
trihedra
Doubled letters
3
Ending in S
0
Most frequent letter
I (13)

Questions

How many 8-letter words matching _____d_a are there?

16. 1 of them are common words.

What is a common example?

PRESIDIA is among the common words in this set.