13-Letter Words Matching _S_____O_____

There are 18 13-letter words that match _S_____O_____. 5 are common words, such as ISOLATIONISMS and ISOLATIONISTS. A rarer one is PSYCHOLOGIZES. In this set, I is the most frequent open letter (17 words). 1 words contain a doubled letter.

Full list 18

isolationismsisolationistspsychologicalpsychologistspsychosomaticasynchronismsescapologistspsephologicalpsephologistsisocarboxazidpseudomonadespseudomorphicpsittacosisespsychologisedpsychologisespsychologismspsychologizedpsychologizes

About this list

Words
18 (5 common words)
Common example
isolationisms
Rare example
psychologizes
Doubled letters
1
Ending in S
11
Most frequent letter
I (17)

Questions

How many 13-letter words matching _s_____o_____ are there?

18. 5 of them are common words.

What is a common example?

ISOLATIONISMS is among the common words in this set.