13-Letter Words Matching T_________O__

There are 26 13-letter words that match T_________O__. 6 are common words, such as TESSELLATIONS and TONSILLECTOMY. A rarer one is TRIPLICATIONS. In this set, S is the most frequent open letter (22 words). 7 words contain a doubled letter.

Full list 26

Common words

tessellationstonsillectomytransgressorstransmissionstroubleshootstypificationstachistoscopetetrastichousthremmatologytransductionstransudationstrephinations
tessellationstonsillectomytransgressorstransmissionstroubleshootstypificationstachistoscopetetrastichousthremmatologytransductionstransudationstrephinationstubulifloroustetanizationstetradynamoustheorizationsthermophilousthiabendazolethunderstrokethyroidectomytransfectionstredecillionstriamcinolonetrichlorphonstrifurcationstriplications

About this list

Words
26 (6 common words)
Common example
tessellations
Rare example
triplications
Doubled letters
7
Ending in S
19
Most frequent letter
S (22)

Questions

How many 13-letter words matching t_________o__ are there?

26. 6 of them are common words.

What is a common example?

TESSELLATIONS is among the common words in this set.