9-Letter Words Matching ___K___M_

There are 12 9-letter words that match ___K___M_. 7 are common words, such as BOOKWORMS and COCKSCOMB. A rarer one is MUCKWORMS. In this set, O is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 12

bookwormscockscombdarkroomshookwormssickroomssilkwormsworkroomsbackroomschokedampcockamamyleukotomymuckworms

About this list

Words
12 (7 common words)
Common example
bookworms
Rare example
muckworms
Doubled letters
6
Ending in S
8
Most frequent letter
O (12)

Questions

How many 9-letter words matching ___k___m_ are there?

12. 7 of them are common words.

What is a common example?

BOOKWORMS is among the common words in this set.