15-Letter Words Matching ___________T_R_

There are 34 15-letter words that match ___________T_R_. 8 are common words, such as NONCONTRIBUTORY and NONINFLAMMATORY. A rarer one is TURBOGENERATORS. In this set, O is the most frequent open letter (31 words). 8 words contain a doubled letter.

Full list 34

Common words

noncontributorynoninflammatoryprocrastinatorsprognosticatorssuperconductorsteletypewriterstroubleshootersuncomplimentarydifferentiatorsdissatisfactoryexcommunicatoryinterferometers
noncontributorynoninflammatoryprocrastinatorsprognosticatorssuperconductorsteletypewriterstroubleshootersuncomplimentarydifferentiatorsdissatisfactoryexcommunicatoryinterferometersprocrastinatoryprognosticatoryunparliamentaryantifilibustersbronchodilatorscoinvestigatorsconcertmeistersdecontaminatorsdiffractometersexcommunicatorsintervalometersmicroprojectorsnonarchitecturepostdivestiturepoststimulatoryretroreflectorsschlockmeistersscintillometerssemidocumentarytechnostructurethermoreceptorsturbogenerators

About this list

Words
34 (8 common words)
Common example
noncontributory
Rare example
turbogenerators
Doubled letters
8
Ending in S
21
Most frequent letter
O (31)

Questions

How many 15-letter words matching ___________t_r_ are there?

34. 8 of them are common words.

What is a common example?

NONCONTRIBUTORY is among the common words in this set.