12-Letter Words Matching _SO_________

There are 18 12-letter words that match _SO_________. 3 are common words, such as ESOTERICALLY and ISOLATIONISM. A rarer one is ISOTONICALLY. In this set, I is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 18

esotericallyisolationismisolationistisochromaticisodiametricisometropiasisomorphismsisopropanolsisothermallyisotopicallyesotericismsisoantigenicisobutylenesisochronallyisochronismsisoenzymaticisoprenalineisotonically

About this list

Words
18 (3 common words)
Common example
esoterically
Rare example
isotonically
Doubled letters
5
Ending in S
6
Most frequent letter
I (18)

Questions

How many 12-letter words matching _so_________ are there?

18. 3 of them are common words.

What is a common example?

ESOTERICALLY is among the common words in this set.