9-Letter Words Ending in FF

There are 13 9-letter words that end in FF. 5 are common words, such as FLAGSTAFF and FOODSTUFF. A rarer one is NONTARIFF. In this set, T is the most frequent open letter (11 words). 13 words contain a doubled letter.

Full list 13

flagstafffoodstuffpikestaffplaintiffwaitstaffcrossrufffeedstufffisticuffoverstaffoverstuffcowlstaffcreampuffnontariff

About this list

Words
13 (5 common words)
Common example
flagstaff
Rare example
nontariff
Doubled letters
13
Ending in S
0
Most frequent letter
T (11)

Questions

How many 9-letter words ending in ff are there?

13. 5 of them are common words.

What is a common example?

FLAGSTAFF is among the common words in this set.