14-Letter Words Matching ____K________S

There are 20 14-letter words that match ____K________S. 9 are common words, such as BRACKISHNESSES and BRINKSMANSHIPS. A rarer one is TRICKISHNESSES. In this set, E is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 20

brackishnessesbrinksmanshipsforeknowledgesfreakishnesseshandkerchievesknickerbockersstrikebreakersthankfulnessesunlikelinessescheckerberriesknuckledustersblackguardismsblacksmithingsblanketflowersdrinkabilitiesknuckleballersmegakaryocytesprankishnessesthinkingnessestrickishnesses

About this list

Words
20 (9 common words)
Common example
brackishnesses
Rare example
trickishnesses
Doubled letters
9
Ending in S
20
Most frequent letter
E (17)

Questions

How many 14-letter words matching ____k________s are there?

20. 9 of them are common words.

What is a common example?

BRACKISHNESSES is among the common words in this set.