11-Letter Words Matching F____D_____

There are 12 11-letter words that match F____D_____. 8 are common words, such as FECUNDATING and FECUNDATION. A rarer one is FLORIDITIES. In this set, I is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 12

fecundatingfecundationfecunditiesflounderingforbiddingsfriendliestfriendshipsfrigiditiesforbiddancefrigidariumferredoxinsfloridities

About this list

Words
12 (8 common words)
Common example
fecundating
Rare example
floridities
Doubled letters
3
Ending in S
6
Most frequent letter
I (12)

Questions

How many 11-letter words matching f____d_____ are there?

12. 8 of them are common words.

What is a common example?

FECUNDATING is among the common words in this set.