10-Letter Words Ending in FFS

There are 12 10-letter words that end in FFS. 6 are common words, such as FISTICUFFS and FLAGSTAFFS. A rarer one is OVERSTAFFS. 12 words contain a doubled letter.

Full list 12

fisticuffsflagstaffsfoodstuffspikestaffsplaintiffswaitstaffscrossruffsfeedstuffsoverstuffscowlstaffscreampuffsoverstaffs

About this list

Words
12 (6 common words)
Common example
fisticuffs
Rare example
overstaffs
Doubled letters
12
Ending in S
12

Questions

How many 10-letter words ending in ffs are there?

12. 6 of them are common words.

What is a common example?

FISTICUFFS is among the common words in this set.