15-Letter Words Matching ____R___O______

There are 26 15-letter words that match ____R___O______. 5 are common words, such as INTERSCHOLASTIC and PROPRIETORSHIPS. A rarer one is XERORADIOGRAPHY. 6 words contain a doubled letter.

Full list 26

Common words

interscholasticproprietorshipsquarrelsomenesssuperfluousnesssuperimpositionautoradiographsinstructorshipsinterferometersinterferometricproprietoriallyantirationalismantirationalist
interscholasticproprietorshipsquarrelsomenesssuperfluousnesssuperimpositionautoradiographsinstructorshipsinterferometersinterferometricproprietoriallyantirationalismantirationalistantirationalityautoradiographydiffractometersdiffractometrichyperinvolutionhypervelocitiesinterparoxysmalintervalometersnephrectomizingnonaristocraticsuperabsorbentssupermajoritiestemerariousnessxeroradiography

About this list

Words
26 (5 common words)
Common example
interscholastic
Rare example
xeroradiography
Doubled letters
6
Ending in S
12

Questions

How many 15-letter words matching ____r___o______ are there?

26. 5 of them are common words.

What is a common example?

INTERSCHOLASTIC is among the common words in this set.