12-Letter Words Matching _____D___O__

There are 32 12-letter words that match _____D___O__. 13 are common words, such as APPENDECTOMY and DEGRADATIONS. A rarer one is SUCCEDANEOUS. In this set, I is the most frequent open letter (27 words). 4 words contain a doubled letter.

Full list 32

Common words

appendectomydegradationsdepredationselucidationsextraditionsfecundationsintroductorykaleidoscopeliquidationspeccadilloesreconditionsretardations
appendectomydegradationsdepredationselucidationsextraditionsfecundationsintroductorykaleidoscopeliquidationspeccadilloesreconditionsretardationstrepidationsamphidiploidcuspidationsinterdictoryorchidaceousorchidectomypachydermoussapindaceouswitchdoctorsaggradationsdeconditionsdeoxidationsepoxidationsgeohydrologyinterdictorsrecordationsreoxidationsstapedectomysubauditionssuccedaneous

About this list

Words
32 (13 common words)
Common example
appendectomy
Rare example
succedaneous
Doubled letters
4
Ending in S
24
Most frequent letter
I (27)

Questions

How many 12-letter words matching _____d___o__ are there?

32. 13 of them are common words.

What is a common example?

APPENDECTOMY is among the common words in this set.