11-Letter Words Matching ___T_F_____

There are 21 11-letter words that match ___T_F_____. 14 are common words, such as CERTIFIABLE and CERTIFIABLY. A rarer one is PLATYFISHES. In this set, I is the most frequent open letter (19 words). 5 words contain a doubled letter.

Full list 21

certifiablecertifiablycertificatedentifricesjustifiablejustifiablymultifamilypestiferouspettifoggedpettifoggerpontificaterectifiablespitefullerwhitefisheslactiferouslactoflavinphotofloodspontificalsgratefullermultifactorplatyfishes

About this list

Words
21 (14 common words)
Common example
certifiable
Rare example
platyfishes
Doubled letters
5
Ending in S
7
Most frequent letter
I (19)

Questions

How many 11-letter words matching ___t_f_____ are there?

21. 14 of them are common words.

What is a common example?

CERTIFIABLE is among the common words in this set.