9-Letter Words Containing TSI

There are 12 9-letter words that contain TSI. 3 are common words, such as HEARTSICK and OUTSIDERS. A rarer one is WHATSISES. In this set, E is the most frequent open letter (11 words). 4 words contain a doubled letter.

Full list 12

heartsickoutsidersrightsizegutsinesspintsizedcourtsidenightsideoutsightsoutsinnedteentsiertsimmeseswhatsises

About this list

Words
12 (3 common words)
Common example
heartsick
Rare example
whatsises
Doubled letters
4
Ending in S
5
Most frequent letter
E (11)

Questions

How many 9-letter words containing tsi are there?

12. 3 of them are common words.

What is a common example?

HEARTSICK is among the common words in this set.