9-Letter Words Matching D_______M

There are 20 9-letter words that match D_______M. 7 are common words, such as DEFEATISM and DEPROGRAM. A rarer one is DISCIFORM. In this set, I is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 20

defeatismdeprogramdespotismdeuteriumdiaphragmdisesteemdogmatismdaltonismdecenniumdentaliumdentiformdiabolismdialogismdiazoniumdichasiumdichroismdisaffirmdoronicumdicrotismdisciform

About this list

Words
20 (7 common words)
Common example
defeatism
Rare example
disciform
Doubled letters
3
Ending in S
0
Most frequent letter
I (19)

Questions

How many 9-letter words matching d_______m are there?

20. 7 of them are common words.

What is a common example?

DEFEATISM is among the common words in this set.