14-Letter Words Matching ___R_F________

There are 20 14-letter words that match ___R_F________. 7 are common words, such as CLARIFICATIONS and GLORIFICATIONS. A rarer one is WEARIFULNESSES. 6 words contain a doubled letter.

Full list 20

clarificationsglorificationsmournfulnessesnitrificationsscarificationsunprofessionalvitrificationspetrificationscaprificationsmicrofibrillarmicrofilamentsneurofibromataretroflectionsscornfulnessessportfishermansportfishermensportfulnessestetrafluoridesultrafiltrateswearifulnesses

About this list

Words
20 (7 common words)
Common example
clarifications
Rare example
wearifulnesses
Doubled letters
6
Ending in S
15

Questions

How many 14-letter words matching ___r_f________ are there?

20. 7 of them are common words.

What is a common example?

CLARIFICATIONS is among the common words in this set.