13-Letter Words Matching ______IF_____

There are 25 13-letter words that match ______IF_____. 4 are common words, such as CARBONIFEROUS and INSIGNIFICANT. A rarer one is UNSPECIFIABLE. In this set, S is the most frequent open letter (24 words). 6 words contain a doubled letter.

Full list 25

Common words

carboniferousinsignificantunjustifiableunjustifiablyaluminiferousargentiferousargilliferousbalsamiferouscalcariferousfossiliferousglobuliferoushousewiferies
carboniferousinsignificantunjustifiableunjustifiablyaluminiferousargentiferousargilliferousbalsamiferouscalcariferousfossiliferousglobuliferoushousewiferiesmetalliferousnickeliferousquartziferoussplendiferousumbelliferousunfalsifiableunqualifiedlygarnetiferousinterdiffusedinterdiffusesscalariformlystoloniferousunspecifiable

About this list

Words
25 (4 common words)
Common example
carboniferous
Rare example
unspecifiable
Doubled letters
6
Ending in S
17
Most frequent letter
S (24)

Questions

How many 13-letter words matching ______if_____ are there?

25. 4 of them are common words.

What is a common example?

CARBONIFEROUS is among the common words in this set.