15-Letter Words Matching ___T_________T_

There are 25 15-letter words that match ___T_________T_. 7 are common words, such as BACTERIOLOGISTS and CONTEMPORANEITY. A rarer one is RESTRICTIONISTS. In this set, I is the most frequent open letter (23 words). 6 words contain a doubled letter.

Full list 25

Common words

bacteriologistscontemporaneitydestructibilityhorticulturistsinstrumentalityobstructionistssentimentalistsabstractionistscontemptibilitycontractibilitycontrollabilityphotoelasticity
bacteriologistscontemporaneitydestructibilityhorticulturistsinstrumentalityobstructionistssentimentalistsabstractionistscontemptibilitycontractibilitycontrollabilityphotoelasticityunattainabilitydestructionistsdistractibilitymontmorillonitemultiwavelengthpantisocratistsphotobiologistsphotodissociatephotogeologistsphytoflagellatepostadolescentsprotozoologistsrestrictionists

About this list

Words
25 (7 common words)
Common example
bacteriologists
Rare example
restrictionists
Doubled letters
6
Ending in S
12
Most frequent letter
I (23)

Questions

How many 15-letter words matching ___t_________t_ are there?

25. 7 of them are common words.

What is a common example?

BACTERIOLOGISTS is among the common words in this set.