12-Letter Words Matching ______S___I_

There are 21 12-letter words that match ______S___I_. 6 are common words, such as ARTHROSCOPIC and FLUOROSCOPIC. A rarer one is THALASSAEMIA. 2 words contain a doubled letter.

Full list 21

arthroscopicfluoroscopicnarcissisticstereoscopicstroboscopicthermostatichyperostosislaparoscopicpalimpsesticanaplasmosisantihystericchemiosmoticgastroscopichyperostoticinterpsychicintrapsychicpolariscopicpolyhistoricsomatostatinstethoscopicthalassaemia

About this list

Words
21 (6 common words)
Common example
arthroscopic
Rare example
thalassaemia
Doubled letters
2
Ending in S
2

Questions

How many 12-letter words matching ______s___i_ are there?

21. 6 of them are common words.

What is a common example?

ARTHROSCOPIC is among the common words in this set.