12-Letter Words Matching ________F__S

There are 20 12-letter words that match ________F__S. 6 are common words, such as DECLASSIFIES and DEHUMIDIFIES. A rarer one is TRICHLORFONS. In this set, E is the most frequent open letter (19 words). 7 words contain a doubled letter.

Full list 20

declassifiesdehumidifiesdisqualifiesdissatisfiesreclassifiesteaspoonfulsforaminiferscomplexifiesconspecificscycloolefinsmothproofersprecertifiesprequalifiespresignifiesprespecifiesreidentifiesresolidifiessaccharifiessuperprofitstrichlorfons

About this list

Words
20 (6 common words)
Common example
declassifies
Rare example
trichlorfons
Doubled letters
7
Ending in S
20
Most frequent letter
E (19)

Questions

How many 12-letter words matching ________f__s are there?

20. 6 of them are common words.

What is a common example?

DECLASSIFIES is among the common words in this set.