9-Letter Words Matching ____RF___

There are 31 9-letter words that match ____RF___. 15 are common words, such as COLORFAST and FIBERFILL. A rarer one is UNPERFECT. In this set, E is the most frequent open letter (30 words). 4 words contain a doubled letter.

Full list 31

Common words

colorfastfiberfillimperfectinterfaceinterfereinterfileresurfacespearfishsuperfineunderfeedunderflowunderfoot
colorfastfiberfillimperfectinterfaceinterfereinterfileresurfacespearfishsuperfineunderfeedunderflowunderfootunderfurswaterfallwaterfowlfeverfewshyperfinehyperforminterflowinterfusesuperfuseunderfundenserfinginterfirminterfoldsuperfanssuperfarmsuperfastsuperfirmsuperfundunperfect

About this list

Words
31 (15 common words)
Common example
colorfast
Rare example
unperfect
Doubled letters
4
Ending in S
3
Most frequent letter
E (30)

Questions

How many 9-letter words matching ____rf___ are there?

31. 15 of them are common words.

What is a common example?

COLORFAST is among the common words in this set.