10-Letter Words Matching ____RF____

There are 40 10-letter words that match ____RF____. 19 are common words, such as CHEERFULLY and COLORFULLY. A rarer one is WATERFLOOD. In this set, E is the most frequent open letter (39 words). 8 words contain a doubled letter.

Full list 40

Common words

cheerfullycolorfullyfiberfillsimperfectsinterfacedinterfacesinterfaithinterferedinterferesinterferoninterfiledinterfiles
cheerfullycolorfullyfiberfillsimperfectsinterfacedinterfacesinterfaithinterferedinterferesinterferoninterfiledinterfilespowerfullyresurfacedresurfacesunderfeedswaterfallswaterfowlswaterfrontriverfrontcolorfieldinterfererinterfluvesuperfluidunderfloorunsurfacedalderfliesenserfmentinterfiberinterfoldsinterfusedinterfusesresurfacersuperfarmssuperfirmssuperfixessuperflacksuperfundsunderfundswaterflood

About this list

Words
40 (19 common words)
Common example
cheerfully
Rare example
waterflood
Doubled letters
8
Ending in S
17
Most frequent letter
E (39)

Questions

How many 10-letter words matching ____rf____ are there?

40. 19 of them are common words.

What is a common example?

CHEERFULLY is among the common words in this set.