11-Letter Words Matching ____F_R____

There are 19 11-letter words that match ____F_R____. 7 are common words, such as CALIFORNIUM and PLATFORMING. A rarer one is SLIPFORMING. In this set, I is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 19

californiumplatformingreaffirmingreenforcingreinforcingvociferatedvociferatesomnifariousreinforcersvociferancevociferatorantiforeignchifforobescoinferringluciferasespostformingreafforestsreinformingslipforming

About this list

Words
19 (7 common words)
Common example
californium
Rare example
slipforming
Doubled letters
5
Ending in S
6
Most frequent letter
I (18)

Questions

How many 11-letter words matching ____f_r____ are there?

19. 7 of them are common words.

What is a common example?

CALIFORNIUM is among the common words in this set.