13-Letter Words Matching __________T_R

There are 60 13-letter words that match __________T_R. 10 are common words, such as ADMINISTRATOR and CONCERTMASTER. A rarer one is WEATHERCASTER. In this set, E is the most frequent open letter (50 words). 13 words contain a doubled letter.

Full list 60

Common words

administratorconcertmastercounterfeiterdiscriminatorgranddaughtermicrocomputerquartermastersemiconductorsubcontractorsupercomputerredistributoraccelerometer
administratorconcertmastercounterfeiterdiscriminatorgranddaughtermicrocomputerquartermastersemiconductorsubcontractorsupercomputerredistributoraccelerometeralcoholometerauthenticatorchemoreceptorcongratulatordefibrillatordepressomotordisintegratorilluminometerindoctrinatorknuckledustermaladministermultivibratorphotoreceptorpneumatometerpotentiometerproprioceptorrefractometerrollercoastersaccharometerstationmastertergiversatortransmigratorvasoinhibitorbraillewritercampylobactercandlelightercoconspiratorconglomeratordeconstructorhemacytometerhemocytometerinterpellatorkapellmeistermonochromatornoncompetitornoncooperatorphotodetectorphytoplankterpredestinatorpyrheliometerreconstructorreflectometerrehabilitatorreinvigoratorsaccharimetersubmillimetersuperministerweathercaster

About this list

Words
60 (10 common words)
Common example
administrator
Rare example
weathercaster
Doubled letters
13
Ending in S
0
Most frequent letter
E (50)

Questions

How many 13-letter words matching __________t_r are there?

60. 10 of them are common words.

What is a common example?

ADMINISTRATOR is among the common words in this set.