11-Letter Words Containing ILS

There are 12 11-letter words that contain ILS. 3 are common words, such as COTTONTAILS and FINGERNAILS. A rarer one is QUATREFOILS. In this set, O is the most frequent open letter (9 words). 2 words contain a doubled letter.

Full list 12

cottontailsfingernailsspoilsportscinquefoilsdisembroilseosinophilsneutrophilsspringtailsthiouracilstripletailsyellowtailsquatrefoils

About this list

Words
12 (3 common words)
Common example
cottontails
Rare example
quatrefoils
Doubled letters
2
Ending in S
12
Most frequent letter
O (9)

Questions

How many 11-letter words containing ils are there?

12. 3 of them are common words.

What is a common example?

COTTONTAILS is among the common words in this set.