10-Letter Words Matching ____F___S_

There are 17 10-letter words that match ____F___S_. 5 are common words, such as FLUFFINESS and SCRUFFIEST. A rarer one is STRIFELESS. In this set, I is the most frequent open letter (15 words). 13 words contain a doubled letter.

Full list 17

fluffinessscruffieststuffinessthriftiestthriftlessgraffitistluciferasepacificismscurfinesssquiffiestunsafenesspacificistreafforestsniffinesssnuffliestspiffinessstrifeless

About this list

Words
17 (5 common words)
Common example
fluffiness
Rare example
strifeless
Doubled letters
13
Ending in S
8
Most frequent letter
I (15)

Questions

How many 10-letter words matching ____f___s_ are there?

17. 5 of them are common words.

What is a common example?

FLUFFINESS is among the common words in this set.