13-Letter Words Matching ____FF_______

There are 16 13-letter words that match ____FF_______. 9 are common words, such as DECAFFEINATED and DECAFFEINATES. A rarer one is NONEFFECTIVES. In this set, I is the most frequent open letter (16 words). 16 words contain a doubled letter.

Full list 16

decaffeinateddecaffeinatesdisaffectionsdisaffiliateddisaffiliatesindifferencesindifferentlyinsufficiencyscruffinessesdisaffectedlydisafforestedinsufflationsnonofficiallydisaffirmancenonaffiliatednoneffectives

About this list

Words
16 (9 common words)
Common example
decaffeinated
Rare example
noneffectives
Doubled letters
16
Ending in S
7
Most frequent letter
I (16)

Questions

How many 13-letter words matching ____ff_______ are there?

16. 9 of them are common words.

What is a common example?

DECAFFEINATED is among the common words in this set.