12-Letter Words Matching ___R___F____

There are 13 12-letter words that match ___R___F____. 4 are common words, such as QUARTERFINAL and UNGRACEFULLY. A rarer one is UNFRUITFULLY. 7 words contain a doubled letter.

Full list 13

quarterfinalungracefullyungratefullyuntruthfullyoverstuffingungratifyingoverfulfillsoverstaffingretransformsultraleftismultraleftistultrarefinedunfruitfully

About this list

Words
13 (4 common words)
Common example
quarterfinal
Rare example
unfruitfully
Doubled letters
7
Ending in S
2

Questions

How many 12-letter words matching ___r___f____ are there?

13. 4 of them are common words.

What is a common example?

QUARTERFINAL is among the common words in this set.