14-Letter Words Matching __T_________R_

There are 17 14-letter words that match __T_________R_. 1 are common words, such as INTERPLANETARY and AUTHENTICATORS. A rarer one is ULTRAMINIATURE. In this set, E is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 17

interplanetaryauthenticatorsextraordinaireiatrochemistryinterferometrypetrochemistrypotentiometersultimogenitureultrastructureantiregulatorycytophotometryintelligencersinterbehaviorsinterobserversinterpellatorsinterpupillaryultraminiature

About this list

Words
17 (1 common words)
Common example
interplanetary
Rare example
ultraminiature
Doubled letters
3
Ending in S
6
Most frequent letter
E (17)

Questions

How many 14-letter words matching __t_________r_ are there?

17. 1 of them are common words.

What is a common example?

INTERPLANETARY is among the common words in this set.