12-Letter Words Matching ______D_T___

There are 29 12-letter words that match ______D_T___. 16 are common words, such as COMMENDATION and COMMENDATORY. A rarer one is SEMINUDITIES. In this set, I is the most frequent open letter (28 words). 3 words contain a doubled letter.

Full list 29

Common words

commendationcommendatorydilapidationdiscreditingflacciditiesfluoridatingfluoridationinsipiditiesintimidatingintimidationinvalidatinginvalidation
commendationcommendatorydilapidationdiscreditingflacciditiesfluoridatingfluoridationinsipiditiesintimidatingintimidationinvalidatinginvalidationinvaliditiesorotunditiespreconditionprofunditiesautoxidationdefraudationdilapidatingintimidatorymithridatismrevalidationtransudationtroglodytismintimidatorsinvalidatorsrefoundationrevalidatingseminudities

About this list

Words
29 (16 common words)
Common example
commendation
Rare example
seminudities
Doubled letters
3
Ending in S
8
Most frequent letter
I (28)

Questions

How many 12-letter words matching ______d_t___ are there?

29. 16 of them are common words.

What is a common example?

COMMENDATION is among the common words in this set.