15-Letter Words Matching ______S_____O__

There are 19 15-letter words that match ______S_____O__. 6 are common words, such as ADMINISTRATIONS and BUSINESSPERSONS. A rarer one is REREGISTRATIONS. In this set, N is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 19

administrationsbusinesspersonscircumspectionscongresspersonsprocrastinatorsprognosticatorspaleopsychologyprocrastinatoryprognosticatoryretransmissionscoinvestigatorscommensurationscotransductionsdefenestrationsdisconsolationsneuropsychologynonconsumptionspseudoscorpionsreregistrations

About this list

Words
19 (6 common words)
Common example
administrations
Rare example
reregistrations
Doubled letters
4
Ending in S
15
Most frequent letter
N (18)

Questions

How many 15-letter words matching ______s_____o__ are there?

19. 6 of them are common words.

What is a common example?

ADMINISTRATIONS is among the common words in this set.