12-Letter Words Matching ______F_S___

There are 15 12-letter words that match ______F_S___. 2 are common words, such as CUTTLEFISHES and SILVERFISHES. A rarer one is RIBBONFISHES. In this set, I is the most frequent open letter (15 words). 6 words contain a doubled letter.

Full list 15

cuttlefishessilverfishescircumfusinganglerfishesarcherfishesbutterfishescandlefishescircumfusiondamselfishesgroundfishesguitarfishesmuttonfishesneedlefishespaddlefishesribbonfishes

About this list

Words
15 (2 common words)
Common example
cuttlefishes
Rare example
ribbonfishes
Doubled letters
6
Ending in S
13
Most frequent letter
I (15)

Questions

How many 12-letter words matching ______f_s___ are there?

15. 2 of them are common words.

What is a common example?

CUTTLEFISHES is among the common words in this set.