15-Letter Words Matching _________N____N

There are 12 15-letter words that match _________N____N. 3 are common words, such as DECONTAMINATION and INSUBORDINATION. A rarer one is POSTVACCINATION. 3 words contain a doubled letter.

Full list 12

decontaminationinsubordinationprocrastinationdehydrogenationindeterminationrecontaminationredeterminationcodeterminationplatitudinarianpostmillenarianpostpollinationpostvaccination

About this list

Words
12 (3 common words)
Common example
decontamination
Rare example
postvaccination
Doubled letters
3
Ending in S
0

Questions

How many 15-letter words matching _________n____n are there?

12. 3 of them are common words.

What is a common example?

DECONTAMINATION is among the common words in this set.