11-Letter Words Matching __R__F_____

There are 12 11-letter words that match __R__F_____. 6 are common words, such as CERTIFIABLE and CERTIFIABLY. A rarer one is PARAFFINING. In this set, E is the most frequent open letter (10 words). 4 words contain a doubled letter.

Full list 12

certifiablecertifiablycertificatepermafrostspersiflagesscruffinessdorsiferousferriferousstrawflowerterraformedfirstfruitsparaffining

About this list

Words
12 (6 common words)
Common example
certifiable
Rare example
paraffining
Doubled letters
4
Ending in S
6
Most frequent letter
E (10)

Questions

How many 11-letter words matching __r__f_____ are there?

12. 6 of them are common words.

What is a common example?

CERTIFIABLE is among the common words in this set.