9-Letter Words Matching ____SF___

There are 12 9-letter words that match ____SF___. 9 are common words, such as CROSSFIRE and GLASSFULS. A rarer one is TRANSFECT. In this set, T is the most frequent open letter (10 words). 4 words contain a doubled letter.

Full list 12

crossfireglassfulssatisfiedsatisfiestownsfolktransferstransfixttransformtransfusecoltsfootcocksfoottransfect

About this list

Words
12 (9 common words)
Common example
crossfire
Rare example
transfect
Doubled letters
4
Ending in S
3
Most frequent letter
T (10)

Questions

How many 9-letter words matching ____sf___ are there?

12. 9 of them are common words.

What is a common example?

CROSSFIRE is among the common words in this set.