15-Letter Words Containing SF

There are 12 15-letter words that contain SF. 4 are common words, such as DISSATISFACTION and NONTRANSFERABLE. A rarer one is POSTTRANSFUSION. In this set, T is the most frequent open letter (12 words). 5 words contain a doubled letter.

Full list 12

dissatisfactionnontransferabletransfigurationtransformationsautotransformerdissatisfactorydysfunctionallytransferabilityautotransfusiondisfurnishmentsdistressfulnessposttransfusion

About this list

Words
12 (4 common words)
Common example
dissatisfaction
Rare example
posttransfusion
Doubled letters
5
Ending in S
3
Most frequent letter
T (12)

Questions

How many 15-letter words containing sf are there?

12. 4 of them are common words.

What is a common example?

DISSATISFACTION is among the common words in this set.