9-Letter Words Ending in OOL

There are 12 9-letter words that end in OOL. 4 are common words, such as FOOTSTOOL and PRESCHOOL. A rarer one is UNDERWOOL. In this set, S is the most frequent open letter (8 words). 12 words contain a doubled letter.

Full list 12

footstoolpreschooltoadstoolwhirlpoolcampstoolfaldstoollambswoolsupercoolundercoolnonschoolultracoolunderwool

About this list

Words
12 (4 common words)
Common example
footstool
Rare example
underwool
Doubled letters
12
Ending in S
0
Most frequent letter
S (8)

Questions

How many 9-letter words ending in ool are there?

12. 4 of them are common words.

What is a common example?

FOOTSTOOL is among the common words in this set.