12-Letter Words Matching __F_C_______

There are 20 12-letter words that match __F_C_______. 9 are common words, such as AFFECTATIONS and AFFECTIONATE. A rarer one is OLFACTOMETER. In this set, I is the most frequent open letter (17 words). 15 words contain a doubled letter.

Full list 20

affectationsaffectionatedeficiencieseffectuatingefficienciesinfectiouslyofficeholderofficialdomsofficialismseffectualityeffectuationofficialesesofficiationssafecrackerssafecrackingaffectednessafficionadosefficacitiesoffscouringsolfactometer

About this list

Words
20 (9 common words)
Common example
affectations
Rare example
olfactometer
Doubled letters
15
Ending in S
12
Most frequent letter
I (17)

Questions

How many 12-letter words matching __f_c_______ are there?

20. 9 of them are common words.

What is a common example?

AFFECTATIONS is among the common words in this set.