13-Letter Words Matching F__O_________

There are 16 13-letter words that match F__O_________. 5 are common words, such as FEROCIOUSNESS and FLOODLIGHTING. A rarer one is FLUOROURACILS. In this set, L is the most frequent open letter (15 words). 4 words contain a doubled letter.

Full list 16

ferociousnessfloodlightingfluorescencesfluoridationsfluorocarbonsfavorablenessfluoroscopiesfeloniousnessfluorimetriesfluorinationsfluorochromesfluorographicfluorometriesfluoroscopingfluoroscopistfluorouracils

About this list

Words
16 (5 common words)
Common example
ferociousness
Rare example
fluorouracils
Doubled letters
4
Ending in S
12
Most frequent letter
L (15)

Questions

How many 13-letter words matching f__o_________ are there?

16. 5 of them are common words.

What is a common example?

FEROCIOUSNESS is among the common words in this set.