10-Letter Words Matching ____LS____

There are 12 10-letter words that match ____LS____. 9 are common words, such as CRAWLSPACE and EXCELSIORS. A rarer one is METALSMITH. In this set, O is the most frequent open letter (10 words). 2 words contain a doubled letter.

Full list 12

crawlspaceexcelsiorsexpulsionsimpulsionsrepulsionsrevulsionsspoilsportupholstersupholsterydrillstocksmallswordmetalsmith

About this list

Words
12 (9 common words)
Common example
crawlspace
Rare example
metalsmith
Doubled letters
2
Ending in S
6
Most frequent letter
O (10)

Questions

How many 10-letter words matching ____ls____ are there?

12. 9 of them are common words.

What is a common example?

CRAWLSPACE is among the common words in this set.