8-Letter Words Matching ____RF__

There are 13 8-letter words that match ____RF__. 5 are common words, such as CHEERFUL and COLORFUL. A rarer one is SUPERFAN. 2 words contain a doubled letter.

Full list 13

cheerfulcolorfulpowerfulunderfedunderfurfeverfewsuperfixalderflyenserfedhumorfulodourfulsneerfulsuperfan

About this list

Words
13 (5 common words)
Common example
cheerful
Rare example
superfan
Doubled letters
2
Ending in S
0

Questions

How many 8-letter words matching ____rf__ are there?

13. 5 of them are common words.

What is a common example?

CHEERFUL is among the common words in this set.