9-Letter Words Matching _N____F__

There are 13 9-letter words that match _N____F__. 4 are common words, such as KNOCKOFFS and UNHELPFUL. A rarer one is UNHOPEFUL. In this set, U is the most frequent open letter (10 words). 4 words contain a doubled letter.

Full list 13

knockoffsunhelpfulunmindfuluntactfulundutifulunharmfulunheedfulunrestfulunthriftyenfeoffedinfeoffedunbriefedunhopeful

About this list

Words
13 (4 common words)
Common example
knockoffs
Rare example
unhopeful
Doubled letters
4
Ending in S
1
Most frequent letter
U (10)

Questions

How many 9-letter words matching _n____f__ are there?

13. 4 of them are common words.

What is a common example?

KNOCKOFFS is among the common words in this set.